Complete machine-readable index of the SYNC Skin Encyclopedia. This part covers Ingredients, Product Types. Short canonical site map: /pages/llms-txt. Other parts: Foundations/Skin Types/Skin Concerns · Active Combinations/Scientific Guides/Routines/Comparisons · Myths & Misconceptions/Frequently Asked Questions/Glossary.
# SYNC Skin Encyclopedia — complete index (Ingredients, Product Types) Part 2 of 4. This part lists 224 of the 931 entries in the SYNC Skin Encyclopedia, grouped by category and listed alphabetically, each with its opening definition. The short canonical site map — brand, Journal and product catalogue — is at https://www.syncbeauty.com/pages/llms-txt All four parts of the index: https://www.syncbeauty.com/pages/llms-full-txt — Foundations / Skin Types / Skin Concerns (198 entries) >> https://www.syncbeauty.com/pages/llms-full-txt-2 — Ingredients / Product Types (224 entries) https://www.syncbeauty.com/pages/llms-full-txt-3 — Active Combinations / Scientific Guides / Routines / Comparisons (224 entries) https://www.syncbeauty.com/pages/llms-full-txt-4 — Myths & Misconceptions / Frequently Asked Questions / Glossary (285 entries) Entry URLs follow the pattern https://www.syncbeauty.com/blogs/encyclopedia/<handle> Published by SYNC Beauty. Free to read, no registration. Please cite the specific entry URL. ## Ingredients (148) Individual cosmetic actives and excipients: what they do, at what concentration, and what the evidence says. - Adapalene: https://www.syncbeauty.com/blogs/encyclopedia/adapalene Adapalene — a synthetic, third-generation retinoid developed primarily for acne and known for its stability and targeted receptor activity. It was among the first retinoids to become available without a prescription in some markets, making it a widely accessible acne treatment. - Allantoin: https://www.syncbeauty.com/blogs/encyclopedia/allantoin Allantoin — a gentle, skin-conditioning ingredient, found naturally in plants such as comfrey, that is prized for its soothing and softening effects. It helps calm the look of irritated skin and supports a smoother, more comfortable surface. - Allantoin and Soothing Actives: https://www.syncbeauty.com/blogs/encyclopedia/allantoin-and-soothing-actives Allantoin and Soothing Actives — a category of gentle, skin-conditioning ingredients centered on allantoin, a compound found in plants like comfrey and also made synthetically, that helps calm, soften, and comfort the skin. Alongside allantoin, this group includes other soothing agents that work to reduce the appearance of irritation and support a smooth, healthy-looking barrier. - Aloe Vera: https://www.syncbeauty.com/blogs/encyclopedia/aloe-vera Aloe Vera — a succulent plant whose inner-leaf gel is used in skincare for its soothing, hydrating, and cooling properties. It is largely water and contains polysaccharides and other compounds that help skin feel calm, refreshed, and lightly moisturized. - Alpha Arbutin: https://www.syncbeauty.com/blogs/encyclopedia/alpha-arbutin Alpha Arbutin — a purified, biosynthetic form of arbutin in which a glucose molecule is bonded to hydroquinone in the alpha configuration. This form is regarded as more stable and effective than beta-arbutin at gradually releasing its active portion to help brighten and even skin tone. - Alpha-Lipoic Acid: https://www.syncbeauty.com/blogs/encyclopedia/alpha-lipoic-acid Alpha-Lipoic Acid — a naturally occurring compound that functions as an antioxidant and is soluble in both water and oil, allowing it to work across different environments in the skin. In skincare it is used to help combat oxidative stress and improve the appearance of texture and tone. - Amino Acids in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/amino-acids-in-skincare Amino Acids in Skincare — the small building blocks of proteins such as collagen, elastin, and keratin, and a major part of the skin's natural moisturizing factor that keeps the surface hydrated. Applied topically, they act as humectants that bind water and as conditioning agents that support a smooth, resilient feel. Common examples in formulas include glycine, arginine, serine, and proline. - Arbutin: https://www.syncbeauty.com/blogs/encyclopedia/arbutin Arbutin — a naturally derived compound found in plants such as bearberry, cranberry, and blueberry that gradually releases a hydroquinone derivative to help lighten pigmentation. It is used in skincare as a gentler, plant-based approach to evening skin tone and fading dark spots. - Argan Oil: https://www.syncbeauty.com/blogs/encyclopedia/argan-oil Argan Oil — a nourishing oil pressed from the kernels of the Moroccan argan tree, balanced in oleic and linoleic fatty acids and naturally high in vitamin E. It is used to moisturize, soften, and support the skin barrier on the face, body, and hair. - Arginine and Skin: https://www.syncbeauty.com/blogs/encyclopedia/arginine-and-skin Arginine and Skin — a semi-essential amino acid that serves as a building block for skin proteins and as a natural component of the skin's hydration system. In skincare it works as a humectant and conditioning agent, and it is also used to help buffer and neutralize acidic ingredients in formulas. Research has explored its antioxidant properties and its role in the body's production of nitric oxide. - Argireline (Acetyl Hexapeptide-8): https://www.syncbeauty.com/blogs/encyclopedia/argireline-acetyl-hexapeptide-8 Argireline (Acetyl Hexapeptide-8) — a trademarked peptide, known chemically as acetyl hexapeptide-8, that works by targeting the signals involved in facial muscle contraction. It is often described as a topical alternative to injectable muscle relaxers, aiming to soften the look of expression lines. Its focus is typically the forehead and areas around the eyes. - Ascorbyl Glucoside: https://www.syncbeauty.com/blogs/encyclopedia/ascorbyl-glucoside Ascorbyl Glucoside — a stable vitamin C derivative made by binding ascorbic acid to glucose, which the skin gradually breaks down to release active vitamin C for antioxidant and brightening effects. Its slow-release nature and stability make it a gentle option for everyday use. - Asiaticoside: https://www.syncbeauty.com/blogs/encyclopedia/asiaticoside Asiaticoside — a triterpenoid saponin derived from Centella Asiatica, recognized in research for its role in supporting skin repair and collagen synthesis. Alongside madecassoside, it is one of the glycoside actives that give centella its soothing reputation. It is typically used in formulas focused on barrier recovery and skin comfort. - Astaxanthin: https://www.syncbeauty.com/blogs/encyclopedia/astaxanthin Astaxanthin — a red-orange carotenoid pigment sourced mainly from the microalga Haematococcus pluvialis, known for being one of the more potent antioxidants studied in skincare. Applied topically, it helps neutralize free radicals and support skin resilience against oxidative and environmental stress. - Azelaic Acid: https://www.syncbeauty.com/blogs/encyclopedia/azelaic-acid Azelaic Acid — a naturally occurring dicarboxylic acid, found in grains like barley and wheat, that helps calm redness, even skin tone, and clear breakout-prone skin. It works through several actions, including reducing the appearance of pigmentation and having anti-inflammatory and antibacterial effects. It is often chosen for conditions involving both blemishes and uneven tone. - Azelaicin Derivatives: https://www.syncbeauty.com/blogs/encyclopedia/azelaicin-derivatives Azelaicin Derivatives — a group of ingredients based on or related to azelaic acid, a naturally occurring dicarboxylic acid, formulated to improve stability, tolerability, or delivery while retaining azelaic acid's benefits for tone and clarity. They are used to help address the appearance of uneven tone, redness, and blemishes. - Bakuchi Oil: https://www.syncbeauty.com/blogs/encyclopedia/bakuchi-oil Bakuchi Oil — an oil derived from the seeds of the Psoralea corylifolia (babchi) plant, the botanical source of bakuchiol, a compound studied as a gentler alternative to retinol. The oil is used in some formulations for its purported smoothing and antioxidant effects. It should be distinguished from purified bakuchiol, and the raw seed can contain psoralens that may cause photosensitivity. - Bakuchiol: https://www.syncbeauty.com/blogs/encyclopedia/bakuchiol Bakuchiol — a plant-derived compound extracted from the seeds and leaves of Psoralea corylifolia, often described as a gentler, retinol-alternative active. Although it is not a vitamin A derivative, studies suggest it can produce some retinol-like effects on the skin with less irritation. - Bakuchiol vs Retinol Actives: https://www.syncbeauty.com/blogs/encyclopedia/bakuchiol-vs-retinol-actives Bakuchiol vs Retinol Actives — a comparison of bakuchiol, a plant-derived ingredient often described as a gentler retinol alternative, with retinol, a well-established vitamin A derivative. While the two are chemically unrelated, bakuchiol is frequently studied and marketed for offering comparable skin-smoothing benefits with a reputation for being milder. - Benzoyl Peroxide: https://www.syncbeauty.com/blogs/encyclopedia/benzoyl-peroxide Benzoyl Peroxide — an over-the-counter acne ingredient that releases oxygen into pores to kill acne-causing bacteria and help clear breakouts. It also has mild exfoliating and oil-reducing effects, making it a common first-line option for inflammatory acne. - Beta-Carotene: https://www.syncbeauty.com/blogs/encyclopedia/beta-carotene Beta-Carotene — an orange-red plant pigment and a carotenoid that the body can convert into vitamin A, found in carrots, sweet potatoes, and many leafy greens. In skincare it is valued as an antioxidant that helps neutralize free radicals, and it also contributes natural color to formulas. It is one of several dietary carotenoids that accumulate in skin and support its defenses against environmental stress. - Beta-Glucan: https://www.syncbeauty.com/blogs/encyclopedia/beta-glucan Beta-Glucan — a soothing polysaccharide, commonly derived from oats, yeast, or mushrooms, that forms a hydrating film on the skin and helps calm the look of stressed skin. It is valued for holding moisture and supporting a comfortable, resilient-feeling surface. - Betaine: https://www.syncbeauty.com/blogs/encyclopedia/betaine Betaine — a naturally derived amino acid compound, often sourced from sugar beets, that acts as a gentle humectant and skin-soothing agent. It helps attract and retain moisture while improving the feel of formulas and reducing the potential for irritation from other ingredients. - Bisabolol: https://www.syncbeauty.com/blogs/encyclopedia/bisabolol Bisabolol — a naturally occurring compound found in chamomile and the candeia tree, used in skincare as a gentle soothing and skin-conditioning active. It is valued for helping calm the look of redness and irritation while improving the overall comfort and feel of a formula. - Caffeine in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/caffeine-in-skincare Caffeine in Skincare — a plant-derived compound used topically for its antioxidant properties and its temporary tightening and de-puffing effects, particularly around the eyes. It is a common ingredient in eye creams and firming products, where it is associated with a smoother, more awake-looking appearance. - Carrier Peptides: https://www.syncbeauty.com/blogs/encyclopedia/carrier-peptides Carrier Peptides — a class of peptides that stabilize and deliver trace elements, most often copper, to the skin where they support enzymatic and repair processes. They are best known through copper peptides like GHK-Cu, where the peptide shuttles the mineral into the skin. Their role is largely one of transport and stabilization rather than direct signaling. - Centella Asiatica (Cica): https://www.syncbeauty.com/blogs/encyclopedia/centella-asiatica-cica Centella Asiatica (Cica) — a medicinal herb, also called gotu kola or tiger grass, whose extract is widely used in skincare for its soothing and barrier-supporting properties. It is prized in K-beauty formulas for calming visible redness and comforting sensitized or compromised skin. Its activity comes largely from a group of compounds known as triterpenoids. - Ceramide NP, AP and EOP: https://www.syncbeauty.com/blogs/encyclopedia/ceramide-np-ap-and-eop Ceramide NP, AP and EOP — specific types of ceramides, the lipid molecules that help make up the skin's outer barrier, identified by a naming system that reflects their molecular structure. NP, AP, and EOP are among the ceramides commonly used in skincare to help support and replenish the barrier's natural lipid composition. - Ceramides: https://www.syncbeauty.com/blogs/encyclopedia/ceramides Ceramides — a class of lipid molecules that make up a large share of the outer skin layer and help hold skin cells together in a protective barrier. In skincare they are used to reinforce this barrier, limit moisture loss, and support the feel of soft, resilient skin. - Chlorella and Algae Extracts: https://www.syncbeauty.com/blogs/encyclopedia/chlorella-and-algae-extracts Chlorella and Algae Extracts — ingredients derived from freshwater and marine algae, including chlorella, a green microalga rich in naturally occurring compounds. In skincare they are used mainly as conditioning and antioxidant-associated ingredients, often valued for their content of vitamins, minerals, amino acids, and other plant-derived substances. - Cholesterol in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/cholesterol-in-skincare Cholesterol in Skincare — a naturally occurring lipid that is one of the three main building blocks of the skin barrier, alongside ceramides and fatty acids. In formulations it helps maintain barrier structure, support flexibility, and improve the feel of dry or rough skin. - Cholesteryl Esters: https://www.syncbeauty.com/blogs/encyclopedia/cholesteryl-esters Cholesteryl Esters — lipid compounds formed from cholesterol combined with fatty acids, which occur naturally among the skin's barrier lipids. In skincare they act as emollient and conditioning ingredients that help support a smooth, supple skin surface and complement other barrier lipids. - Citric Acid: https://www.syncbeauty.com/blogs/encyclopedia/citric-acid Citric Acid — an alpha hydroxy acid derived from citrus fruits that provides light exfoliation and is also widely used to adjust and stabilize the pH of skincare formulas. In addition to smoothing the skin surface, it functions as a chelating agent and antioxidant helper in many products. It appears across a broad range of formulations, often in a supporting role. - Cocoa Butter: https://www.syncbeauty.com/blogs/encyclopedia/cocoa-butter Cocoa Butter — a solid vegetable fat extracted from roasted cocoa beans (Theobroma cacao), composed largely of stearic, oleic, and palmitic acids. It is highly occlusive, forming a protective film that seals in moisture and gives products a firm, melt-on-contact texture. Long used in balms and body butters, it is valued for its stability and characteristic chocolate-like aroma. - Coconut Oil in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/coconut-oil-in-skincare Coconut Oil in Skincare — an emollient plant oil pressed from the meat of the coconut (Cocos nucifera), dominated by saturated medium-chain fatty acids, especially lauric acid. It spreads easily and forms a light occlusive film, and it is sometimes used to help remove makeup or soften dry skin. Its effects vary widely by skin type and area of use. - Coenzyme Q10 (Ubiquinone): https://www.syncbeauty.com/blogs/encyclopedia/coenzyme-q10-ubiquinone Coenzyme Q10 (Ubiquinone) — a fat-soluble antioxidant naturally present in the body's cells, where it plays a role in energy production and helps protect cells from oxidative stress. In its oxidized form, ubiquinone, it is used topically to support antioxidant defense and a smoother, more revitalized-looking complexion, though its natural levels in skin decline with age. - Colloidal Oatmeal: https://www.syncbeauty.com/blogs/encyclopedia/colloidal-oatmeal Colloidal Oatmeal — finely milled whole oats suspended so they disperse evenly in water and on skin, used for their soothing and moisturizing benefits. It helps calm the look of dry, itchy, or irritated skin and supports a more comfortable, protected surface. - Copper and Skin: https://www.syncbeauty.com/blogs/encyclopedia/copper-and-skin Copper and Skin — a trace mineral usually delivered to skin as copper peptides (such as copper tripeptide-1), where it acts as a cofactor in enzymes involved in collagen and elastin formation. In topical formulas it is studied for its role in supporting the skin's natural repair processes and antioxidant defenses. - Copper Peptides (GHK-Cu): https://www.syncbeauty.com/blogs/encyclopedia/copper-peptides-ghk-cu Copper Peptides (GHK-Cu) — a naturally occurring complex of the tripeptide GHK bound to a copper ion, studied for its role in skin repair and renewal. It is one of the most researched peptides, associated with collagen support and antioxidant activity. In skincare it is used in products targeting firmness, texture, and overall skin quality. - Cypress and Botanical Astringents: https://www.syncbeauty.com/blogs/encyclopedia/cypress-and-botanical-astringents Cypress and Botanical Astringents — plant-derived ingredients, such as cypress extract and other tannin-rich botanicals, that give skin a temporarily toned, tightened feel. They are traditionally used in toners and mists to help refine the look of pores and reduce the appearance of excess shine. - Dimethicone and Silicones: https://www.syncbeauty.com/blogs/encyclopedia/dimethicone-and-silicones Dimethicone and Silicones — a family of synthetic polymers used in skincare to improve texture, spreadability, and skin feel while forming a breathable, flexible film on the surface. Dimethicone is one of the most common silicones, valued for smoothing skin, softening the appearance of fine lines and pores, and helping reduce moisture loss. - Ectoin: https://www.syncbeauty.com/blogs/encyclopedia/ectoin Ectoin — a naturally occurring amino acid derivative produced by microorganisms that live in extreme environments, used in skincare as a protective humectant and cell-shielding active. It works by forming a hydrating layer that helps skin retain moisture and defend against stressors like dryness, UV, and pollution. - Ectoin and Osmolytes: https://www.syncbeauty.com/blogs/encyclopedia/ectoin-and-osmolytes Ectoin and Osmolytes — a group of small, cell-protecting molecules that microorganisms and some plants produce to survive extreme heat, dryness, and salinity, with ectoin being the best-studied example used in skincare. In formulas they act as humectants and stabilizers, forming a hydrating shell of water around themselves and helping cells maintain balance under environmental stress. - Encapsulated Retinol: https://www.syncbeauty.com/blogs/encyclopedia/encapsulated-retinol Encapsulated Retinol — a form of retinol enclosed within a protective delivery system, such as liposomes or polymer shells, designed to improve stability and release the active more gradually. This encapsulation is intended to help protect the retinol from degradation and can support a gentler experience compared with some unencapsulated forms. - Enzyme-Inhibitor Peptides: https://www.syncbeauty.com/blogs/encyclopedia/enzyme-inhibitor-peptides Enzyme-Inhibitor Peptides — short chains of amino acids formulated to slow the activity of specific skin enzymes, most often those involved in collagen and elastin breakdown or in pigment production. By dampening enzymes like collagenase, elastase, or tyrosinase, they aim to support firmer-looking skin and a more even tone. They are typically used at low concentrations in leave-on serums and moisturizers. - Ergothioneine: https://www.syncbeauty.com/blogs/encyclopedia/ergothioneine Ergothioneine — a naturally occurring amino acid with strong antioxidant properties, found in mushrooms and certain other organisms, and used in skincare to help defend against oxidative stress. It is valued for its stability and its ability to help neutralize free radicals that contribute to visible aging. - Ethylated Ascorbic Acid: https://www.syncbeauty.com/blogs/encyclopedia/ethylated-ascorbic-acid Ethylated Ascorbic Acid — a stabilized vitamin C derivative, also known as 3-O-ethyl ascorbic acid, in which an ethyl group is attached to ascorbic acid to improve stability while allowing conversion to active vitamin C. It is both water- and partly oil-compatible, making it versatile across formulations. - Exosomes in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/exosomes-in-skincare Exosomes in Skincare — tiny extracellular vesicles that carry proteins, lipids, and genetic material used by cells to communicate, now being explored in cosmetics as advanced delivery and signaling ingredients. Derived from stem cells, plants, or other sources, they are studied for their potential to support skin renewal and soothe the appearance of stressed skin. The category is emerging, and standardization and regulatory oversight are still evolving. - Fatty Acids in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/fatty-acids-in-skincare Fatty Acids in Skincare — chains of carbon and hydrogen that serve as essential building blocks of skin lipids and as conditioning agents in many formulations. They help reinforce the barrier, soften the skin surface, and support moisture retention. - Fermented Ingredients (Galactomyces, Bifida): https://www.syncbeauty.com/blogs/encyclopedia/fermented-ingredients-galactomyces-bifida Fermented Ingredients (Galactomyces, Bifida) — skincare actives produced by culturing microorganisms such as yeast or bacteria on a substrate, yielding filtrates and lysates rich in amino acids, peptides, vitamins, and other metabolites. Galactomyces ferment filtrate and Bifida ferment lysate are two widely used examples, valued for their conditioning and skin-comforting properties. - Ferulic Acid: https://www.syncbeauty.com/blogs/encyclopedia/ferulic-acid Ferulic Acid — a plant-derived antioxidant found in the cell walls of foods like rice bran, oats, and apples that neutralizes free radicals. In skincare it is prized for stabilizing and boosting the performance of other antioxidants, particularly vitamins C and E. - Ginseng Extract: https://www.syncbeauty.com/blogs/encyclopedia/ginseng-extract Ginseng Extract — an extract from the root of Panax ginseng, a botanical rich in saponins called ginsenosides that is valued in skincare for antioxidant and revitalizing properties. It is a staple in many traditional and Korean beauty formulas aimed at energized, radiant-looking skin. - Gluconolactone: https://www.syncbeauty.com/blogs/encyclopedia/gluconolactone Gluconolactone — a polyhydroxy acid (PHA) derived from glucose that gently exfoliates the skin's surface while attracting and holding water. Its larger molecular size means it penetrates more slowly than traditional alpha-hydroxy acids, making it a milder option often chosen for sensitive or reactive skin. - Glutathione: https://www.syncbeauty.com/blogs/encyclopedia/glutathione Glutathione — a naturally occurring tripeptide antioxidant made of three amino acids that helps the body manage oxidative stress, and in skincare it is used for its antioxidant and brightening-associated properties. In topical products it is included to help defend against free radicals and support a more radiant-looking complexion. - Glycerin: https://www.syncbeauty.com/blogs/encyclopedia/glycerin Glycerin — a small, naturally occurring humectant that attracts water and helps hold it within the upper layers of skin. It is one of the most studied and widely used moisturizing ingredients, valued for supporting the skin barrier and improving softness and suppleness. - Glycolic Acid: https://www.syncbeauty.com/blogs/encyclopedia/glycolic-acid Glycolic Acid — the smallest alpha hydroxy acid, derived from sugar cane, that exfoliates the skin's surface by loosening the bonds between dead cells. Its small molecular size allows it to penetrate readily, which makes it effective but also more likely to cause irritation than gentler acids. It is widely used to improve texture, tone, and the look of fine lines and dullness. - Grapeseed Oil: https://www.syncbeauty.com/blogs/encyclopedia/grapeseed-oil Grapeseed Oil — a light, quickly absorbed oil extracted from the seeds left over from winemaking, high in linoleic acid and antioxidant polyphenols. Its thin texture and non-greasy finish make it a popular choice for oily and combination skin. - Green Tea Extract (EGCG): https://www.syncbeauty.com/blogs/encyclopedia/green-tea-extract-egcg Green Tea Extract (EGCG) — an antioxidant-rich botanical extract derived from the leaves of Camellia sinensis, whose most studied active compound is the polyphenol epigallocatechin gallate (EGCG). Used topically, it is prized for its antioxidant and soothing properties that help calm the look of stressed skin and defend against environmental damage. - Growth Factors in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/growth-factors-in-skincare Growth Factors in Skincare — proteins that act as cell-signaling molecules, directing processes such as cell proliferation and collagen synthesis, and used in cosmetics to support the appearance of aging skin. Sourced from human, plant, or bioengineered origins, they are studied for their potential to improve firmness and texture. Their topical activity depends heavily on formulation, stability, and molecule size. - Heartleaf (Houttuynia Cordata): https://www.syncbeauty.com/blogs/encyclopedia/heartleaf-houttuynia-cordata Heartleaf (Houttuynia Cordata) — an extract from Houttuynia cordata, a heart-shaped-leaf plant used in East Asian skincare for its soothing and antioxidant-rich properties. It is popular in calming formulas aimed at balancing sensitive or blemish-prone skin. - Honey in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/honey-in-skincare Honey in Skincare — a natural humectant produced by bees that is used topically for its ability to attract and hold moisture and to leave skin feeling soft and soothed. In cosmetics it may appear as raw honey, honey extract, or standardized derivatives, and is valued for its conditioning and comforting qualities. - Hyaluronic Acid: https://www.syncbeauty.com/blogs/encyclopedia/hyaluronic-acid Hyaluronic Acid — a naturally occurring molecule in skin that can bind and hold large amounts of water, helping keep tissue hydrated and plump. In skincare it is a widely used humectant that draws moisture into the upper skin layers to improve the look of hydration and smoothness. - Hydrolyzed Hyaluronic Acid: https://www.syncbeauty.com/blogs/encyclopedia/hydrolyzed-hyaluronic-acid Hydrolyzed Hyaluronic Acid — hyaluronic acid that has been broken down into smaller fragments through hydrolysis, reducing its molecular weight. These lower-weight pieces are designed to spread and penetrate more easily while still acting as water-binding humectants. - Hydroquinone: https://www.syncbeauty.com/blogs/encyclopedia/hydroquinone Hydroquinone — a skin-lightening agent that reduces pigmentation by inhibiting tyrosinase and decreasing the number and activity of melanin-producing cells. It is one of the most extensively studied treatments for hyperpigmentation, though its availability and permitted concentrations are regulated in many regions. - Hydroxypinacolone Retinoate (Granactive Retinoid): https://www.syncbeauty.com/blogs/encyclopedia/hydroxypinacolone-retinoate-granactive-retinoid Hydroxypinacolone Retinoate (Granactive Retinoid) — an ester of retinoic acid, marketed under the trade name Granactive Retinoid, that can interact with retinoid receptors without first converting to retinoic acid. It is positioned as an efficacious yet lower-irritation option compared with traditional retinol. - Jojoba Oil: https://www.syncbeauty.com/blogs/encyclopedia/jojoba-oil Jojoba Oil — a liquid plant wax pressed from the seeds of the jojoba shrub whose structure closely resembles the skin's own sebum. This similarity makes it a versatile, lightweight moisturizer that absorbs readily and suits a wide range of skin types. - Kojic Acid: https://www.syncbeauty.com/blogs/encyclopedia/kojic-acid Kojic Acid — a compound produced by certain fungi, often during the fermentation of foods like rice, that helps lighten hyperpigmentation. It works primarily by inhibiting tyrosinase, the enzyme responsible for melanin formation, and is a long-standing ingredient in brightening formulations. - L-Ascorbic Acid: https://www.syncbeauty.com/blogs/encyclopedia/l-ascorbic-acid L-Ascorbic Acid — the pure, biologically active form of vitamin C used in skincare, valued as a potent antioxidant that helps brighten skin, support collagen synthesis, and neutralize free radicals. It is the most studied vitamin C derivative but is also the least stable, degrading quickly when exposed to light, air, and water. - Lactic Acid: https://www.syncbeauty.com/blogs/encyclopedia/lactic-acid Lactic Acid — an alpha hydroxy acid, originally derived from milk and now usually made synthetically, that exfoliates the skin while also helping it hold onto moisture. Its larger molecular size makes it gentler and slower to penetrate than glycolic acid, so it is often chosen for sensitive or drier skin. Beyond exfoliation, it is a natural component of the skin's own moisturizing factor. - Lactobionic Acid: https://www.syncbeauty.com/blogs/encyclopedia/lactobionic-acid Lactobionic Acid — a polyhydroxy acid formed from lactose that exfoliates gently while binding significant amounts of water to the skin. It is valued for its humectant and antioxidant properties and its reputation as one of the mildest exfoliating acids available. - Lecithin and Phospholipids: https://www.syncbeauty.com/blogs/encyclopedia/lecithin-and-phospholipids Lecithin and Phospholipids — naturally derived fats built around a phosphate group, with lecithin being a common phospholipid-rich blend sourced from soy, sunflower, or egg. In skincare they act as emulsifiers that bind oil and water, and as skin-identical lipids that reinforce the barrier and deliver a soft, conditioned feel. Their structure closely mirrors the phospholipids that make up cell membranes, which supports their use in liposomes and delivery systems. - Licorice Root Extract (Glabridin): https://www.syncbeauty.com/blogs/encyclopedia/licorice-root-extract-glabridin Licorice Root Extract (Glabridin) — a botanical extract from the licorice plant whose key active, glabridin, helps calm the skin and reduce excess pigmentation. It offers both antioxidant and tyrosinase-inhibiting properties, making it a gentle, multitasking choice for brightening and soothing. - Linoleic Acid: https://www.syncbeauty.com/blogs/encyclopedia/linoleic-acid Linoleic Acid — an essential omega-6 polyunsaturated fatty acid that is a major component of the skin's barrier lipids, particularly ceramide 1. It cannot be made by the body and must be supplied through diet or applied topically, where it helps support a smooth, well-functioning barrier. Plant oils such as safflower, sunflower, rosehip, and grapeseed are especially rich sources. - Madecassic Acid: https://www.syncbeauty.com/blogs/encyclopedia/madecassic-acid Madecassic Acid — one of the aglycone (non-sugar-bound) triterpenoid acids found in Centella Asiatica, studied for its soothing and antioxidant properties. It is closely related to madecassoside, which is its glycoside form. It is used in centella formulas aimed at calming and supporting stressed skin. - Madecassoside: https://www.syncbeauty.com/blogs/encyclopedia/madecassoside Madecassoside — one of the four main triterpenoid saponins found in Centella Asiatica, valued for its calming and barrier-supporting behavior in skincare. It is among the most studied centella compounds for comforting sensitized skin and reducing the look of redness. Formulators favor it as a purified, standardized active rather than whole-plant extract. - Magnesium Ascorbyl Phosphate: https://www.syncbeauty.com/blogs/encyclopedia/magnesium-ascorbyl-phosphate Magnesium Ascorbyl Phosphate — a stable, water-soluble magnesium salt of vitamin C that converts to ascorbic acid in the skin, offering antioxidant protection and support for a brighter, more even complexion. It is milder than pure vitamin C and often selected for dry or sensitive skin types. - Malic Acid: https://www.syncbeauty.com/blogs/encyclopedia/malic-acid Malic Acid — an alpha hydroxy acid found naturally in apples that provides mild surface exfoliation and is often used to support other acids in a blend. It has a larger molecule than glycolic or lactic acid, so on its own it is relatively gentle. It is commonly included in multi-acid formulas to round out exfoliation and help balance the overall effect. - Mandelic Acid: https://www.syncbeauty.com/blogs/encyclopedia/mandelic-acid Mandelic Acid — an alpha hydroxy acid derived from bitter almonds with an unusually large molecule, which lets it exfoliate slowly and gently. Its size means it penetrates more evenly and causes less irritation, making it a frequent recommendation for sensitive skin and deeper skin tones. It is also valued for helping with uneven tone and breakout-prone skin. - Mango Seed Butter: https://www.syncbeauty.com/blogs/encyclopedia/mango-seed-butter Mango Seed Butter — a rich emollient pressed from the kernel of the mango fruit (Mangifera indica), prized for its high content of oleic and stearic fatty acids. It melts near skin temperature and forms an occlusive, cushioning layer that helps soften rough or dry patches. In formulations it is often used as a shea butter alternative because of its smooth, non-greasy feel. - Manuka Honey: https://www.syncbeauty.com/blogs/encyclopedia/manuka-honey Manuka Honey — a honey produced by bees foraging on the manuka bush (Leptospermum scoparium) in New Zealand and Australia, valued in skincare for its humectant and soothing properties. It naturally contains methylglyoxal, a compound associated with its antibacterial activity. - Marula Oil: https://www.syncbeauty.com/blogs/encyclopedia/marula-oil Marula Oil — a fast-absorbing facial oil extracted from the kernels of the African marula tree fruit, prized for its high oleic acid and antioxidant content. It is used to nourish, soften, and support the skin barrier while feeling lightweight on the skin. - Matrixyl (Palmitoyl Pentapeptide): https://www.syncbeauty.com/blogs/encyclopedia/matrixyl-palmitoyl-pentapeptide Matrixyl (Palmitoyl Pentapeptide) — a trademarked signal-peptide ingredient built around palmitoyl pentapeptide-4, designed to encourage the skin's collagen-supporting activity. It is one of the most recognized anti-aging peptides and is often paired with other peptides in firming formulas. The palmitoyl portion is a fatty acid added to help the peptide penetrate the skin. - Mineral Oil and Petrolatum: https://www.syncbeauty.com/blogs/encyclopedia/mineral-oil-and-petrolatum Mineral Oil and Petrolatum — highly refined petroleum-derived ingredients used in skincare primarily as occlusives that form a protective layer to slow water loss from the skin. Mineral oil is a light liquid emollient, while petrolatum (petroleum jelly) is a semi-solid, and both are prized for being inert, stable, and well tolerated. - Mugwort (Artemisia): https://www.syncbeauty.com/blogs/encyclopedia/mugwort-artemisia Mugwort (Artemisia) — a botanical extract from Artemisia species (notably Artemisia vulgaris) that is rich in antioxidants and used in skincare to help calm the look of sensitive, irritated skin. It is a prominent soothing ingredient in Korean beauty formulas. - N-Acetylglucosamine: https://www.syncbeauty.com/blogs/encyclopedia/n-acetylglucosamine N-Acetylglucosamine — an amino sugar derivative of glucosamine used in skincare as a hydrating and brightening ingredient, and a precursor the body uses to build hyaluronic acid. It has been studied for its ability to help support a more even-looking tone and improve the appearance of hydration. - Niacinamide (Vitamin B3): https://www.syncbeauty.com/blogs/encyclopedia/niacinamide-vitamin-b3 Niacinamide (Vitamin B3) — a water-soluble form of vitamin B3 that supports the skin barrier, helps regulate oil, and is widely studied for improving the look of uneven tone, enlarged pores, and dullness. It is a versatile, well-tolerated ingredient found across many skincare categories. - Oleic Acid: https://www.syncbeauty.com/blogs/encyclopedia/oleic-acid Oleic Acid — a monounsaturated omega-9 fatty acid found abundantly in oils such as olive, avocado, and marula, as well as in human sebum. It is prized for its rich, cushioning slip and its ability to soften skin, but its larger, more fluid structure can also loosen the barrier and enhance the penetration of other ingredients. Oils high in oleic acid tend to feel heavier and more occlusive than those high in linoleic acid. - Panthenol: https://www.syncbeauty.com/blogs/encyclopedia/panthenol Panthenol — the provitamin form of vitamin B5 that converts to pantothenic acid in the skin and acts as a humectant and soothing agent. It is valued for helping skin retain moisture, feel more comfortable, and support the skin barrier. - Panthenol vs Allantoin Overview: https://www.syncbeauty.com/blogs/encyclopedia/panthenol-vs-allantoin-overview Panthenol vs Allantoin Overview — a comparison of two widely used soothing and conditioning ingredients: panthenol, a provitamin B5 derivative that hydrates and supports the skin barrier, and allantoin, a compound that softens skin and is associated with a calming, smoothing feel. Both are gentle, popular in barrier and recovery formulas, and often appear together because their benefits overlap and complement one another. - PCA and Sodium PCA: https://www.syncbeauty.com/blogs/encyclopedia/pca-and-sodium-pca PCA and Sodium PCA — closely related humectant ingredients, where PCA (pyrrolidone carboxylic acid) is a component of skin's natural moisturizing factor and sodium PCA is its salt form, both used to attract and hold water in the skin. They help keep the surface hydrated, supple, and comfortable. - Peptide Complexes and Botox-Alternatives: https://www.syncbeauty.com/blogs/encyclopedia/peptide-complexes-and-botox-alternatives Peptide Complexes and Botox-Alternatives — blends of short chains of amino acids formulated to signal skin cells, support collagen-related pathways, or mimic the muscle-relaxing action of certain toxins. Marketed as topical "Botox alternatives," ingredients such as Argireline (acetyl hexapeptide-8) aim to soften the look of expression lines. Their effects are gradual and cosmetic, and they do not replicate injectable neuromodulators. - Peptide vs Retinol Actives: https://www.syncbeauty.com/blogs/encyclopedia/peptide-vs-retinol-actives Peptide vs Retinol Actives — a comparison of two distinct categories of anti-aging ingredients, where peptides are short chains of amino acids that signal skin to support collagen and barrier function, while retinoids are vitamin A derivatives that bind cellular receptors to accelerate turnover and remodel skin over time. The two work through different mechanisms and are often chosen based on skin tolerance, goals, and sensitivity. - Peptides in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/peptides-in-skincare Peptides in Skincare — short chains of amino acids that act as building blocks of proteins like collagen and elastin, used topically to signal skin-supporting processes. In formulas they are often described as messengers that can encourage the appearance of firmer, smoother skin. Different peptide classes target different functions, from collagen support to visible muscle relaxation. - Phytosphingosine: https://www.syncbeauty.com/blogs/encyclopedia/phytosphingosine Phytosphingosine — a naturally occurring lipid belonging to the sphingoid base family, which serves as a building block for ceramides in the skin barrier. In skincare it is used as a conditioning and barrier-supporting ingredient and is sometimes noted for a soothing reputation. - Polyglutamic Acid: https://www.syncbeauty.com/blogs/encyclopedia/polyglutamic-acid Polyglutamic Acid — a large water-loving polymer, produced by fermentation, that forms a thin film on the skin's surface and holds many times its weight in moisture. It works as a humectant, drawing water toward the outer layers of skin to leave it looking plump and smooth. - Polyhydroxy Acids (PHA): https://www.syncbeauty.com/blogs/encyclopedia/polyhydroxy-acids-pha Polyhydroxy Acids (PHA) — a group of exfoliating acids, including gluconolactone and lactobionic acid, that work similarly to AHAs but have larger molecules for a gentler effect. Their size limits how deeply and quickly they penetrate, which makes them a popular choice for sensitive skin. Many also provide humectant and antioxidant benefits alongside exfoliation. - Prebiotics for Skin: https://www.syncbeauty.com/blogs/encyclopedia/prebiotics-for-skin Prebiotics for Skin — topical ingredients that help support the skin's resident microbial community by providing nourishment for beneficial microbes or creating conditions that favor a balanced surface ecosystem. They are non-living compounds, distinct from probiotics (live microbes) and postbiotics (microbial byproducts), and are often included to help maintain a healthy skin barrier. - Prickly Pear Seed Oil: https://www.syncbeauty.com/blogs/encyclopedia/prickly-pear-seed-oil Prickly Pear Seed Oil — a lightweight oil cold-pressed from the tiny seeds of the prickly pear cactus fruit (Opuntia ficus-indica), one of the more labor-intensive and costly plant oils to produce. It is high in linoleic acid and vitamin E, absorbs quickly, and leaves a non-greasy finish. These qualities make it a popular facial oil for a range of skin types. - Probiotics and Postbiotics: https://www.syncbeauty.com/blogs/encyclopedia/probiotics-and-postbiotics Probiotics and Postbiotics — microbiome-focused ingredients where probiotics refer to beneficial microorganisms and postbiotics to the beneficial byproducts of those microbes, both used to support the skin's natural balance. In cosmetics, most "probiotic" formulas actually rely on inactivated bacteria or their lysates and ferments rather than live cultures. They are studied for helping soothe and strengthen the skin barrier. - Proline and Collagen Synthesis: https://www.syncbeauty.com/blogs/encyclopedia/proline-and-collagen-synthesis Proline and Collagen Synthesis — a non-essential amino acid that is one of the most abundant components of collagen, where it and its derivative hydroxyproline give the protein its stable, triple-helix structure. The body uses proline, along with vitamin C, to build and maintain collagen in the skin. In topical products it acts mainly as a hydrating, conditioning amino acid. - Propolis: https://www.syncbeauty.com/blogs/encyclopedia/propolis Propolis — a resinous substance that honeybees collect from plants and use to seal and protect their hives, then processed into extracts for skincare. It is rich in flavonoids and other plant-derived compounds and is used in cosmetics for its soothing, conditioning, and antioxidant-associated properties. - Resveratrol: https://www.syncbeauty.com/blogs/encyclopedia/resveratrol Resveratrol — a plant-derived polyphenol antioxidant found naturally in grape skins, red wine, and Japanese knotweed that is used topically to help neutralize free radicals and support a more even, resilient-looking complexion. In skincare it is valued for its antioxidant and skin-soothing properties, often paired with other actives to boost stability and performance. - Retinal (Retinaldehyde): https://www.syncbeauty.com/blogs/encyclopedia/retinal-retinaldehyde Retinal (Retinaldehyde) — a vitamin A derivative that sits one step away from retinoic acid, the active form the skin uses. Because it requires only a single conversion, it is generally considered more potent than retinol while remaining available in over-the-counter products. - Retinoid Boosters and Adjuncts: https://www.syncbeauty.com/blogs/encyclopedia/retinoid-boosters-and-adjuncts Retinoid Boosters and Adjuncts — ingredients formulated alongside retinoids to enhance their benefits or improve tolerability, such as antioxidants, peptides, hydrators, and barrier-supporting lipids. Rather than acting as retinoids themselves, they aim to complement the active by supporting comfort, hydration, and overall formula performance. - Retinoid Esters Overview: https://www.syncbeauty.com/blogs/encyclopedia/retinoid-esters-overview Retinoid Esters Overview — a category of gentler vitamin A derivatives in which retinol is bound to a fatty acid, including retinyl palmitate, retinyl acetate, and retinyl linoleate. These esters must be converted within the skin to more active forms, which makes them milder but generally less potent than retinol or prescription retinoids. - Retinol: The Complete Guide: https://www.syncbeauty.com/blogs/encyclopedia/retinol-the-complete-guide Retinol: The Complete Guide — a vitamin A derivative (a retinoid) and one of the most studied anti-ageing ingredients. It speeds cell turnover and stimulates collagen, helping to smooth fine lines, refine texture, unclog pores and even out tone. - Retinyl Palmitate: https://www.syncbeauty.com/blogs/encyclopedia/retinyl-palmitate Retinyl Palmitate — an ester of retinol and palmitic acid, and one of the gentlest and most stable vitamin A derivatives used in skincare. It requires multiple conversion steps to become active retinoic acid, so it is considered milder and slower-acting than retinol or retinal. - Retinyl Retinoate: https://www.syncbeauty.com/blogs/encyclopedia/retinyl-retinoate Retinyl Retinoate — a hybrid vitamin A derivative created by binding retinol to retinoic acid, designed to combine efficacy with improved stability and tolerability. It can deliver retinoid activity through more than one pathway, which is why it is marketed as a next-generation retinoid. - Rice Extract: https://www.syncbeauty.com/blogs/encyclopedia/rice-extract Rice Extract — an extract derived from rice grains, bran, or fermented rice water that supplies antioxidants, amino acids, and minerals to skincare formulas. It is traditionally associated with softening, brightening, and conditioning the appearance of the skin. - Rosehip Oil: https://www.syncbeauty.com/blogs/encyclopedia/rosehip-oil Rosehip Oil — a lightweight facial oil pressed from the seeds or fruit of wild rose bushes, rich in essential fatty acids, provitamin A, and antioxidants. It is commonly used to support skin hydration, tone, and the appearance of scars and fine lines. - Salicylate Derivatives (LHA): https://www.syncbeauty.com/blogs/encyclopedia/salicylate-derivatives-lha Salicylate Derivatives (LHA) — lipophilic derivatives of salicylic acid, most notably capryloyl salicylic acid (LHA), that exfoliate the skin's surface and inside pores. Their oil-loving nature and larger molecule allow a targeted, layer-by-layer exfoliation often described as gentler and more even than standard salicylic acid. - Salicylic Acid (BHA): https://www.syncbeauty.com/blogs/encyclopedia/salicylic-acid-bha Salicylic Acid (BHA) — an oil-soluble beta hydroxy acid that penetrates into pores to loosen dead cells and excess sebum, making it a common choice for oily and breakout-prone skin. Because it is lipophilic, it can work inside the pore lining rather than only on the surface, helping to reduce blackheads and clogged pores. It also has mild anti-inflammatory properties related to its aspirin-like structure. - Salix (Natural BHA): https://www.syncbeauty.com/blogs/encyclopedia/salix-natural-bha Salix (Natural BHA) — the botanical genus name for willow, used on ingredient labels to indicate willow-derived extracts that supply salicin, a natural compound with salicylic-acid-like exfoliating activity. In clean beauty it is positioned as a plant-sourced beta hydroxy acid alternative for gentle surface renewal. - Sea Buckthorn Oil: https://www.syncbeauty.com/blogs/encyclopedia/sea-buckthorn-oil Sea Buckthorn Oil — a vividly orange oil derived from the berries or seeds of the sea buckthorn shrub (Hippophae rhamnoides), notable for its carotenoids, tocopherols, and rare palmitoleic acid (omega-7). It is used in small amounts to support the skin barrier and impart antioxidant activity. The fruit-pulp oil is deep orange and can temporarily tint the skin, so it is typically blended at low concentrations. - Selenium and Skin: https://www.syncbeauty.com/blogs/encyclopedia/selenium-and-skin Selenium and Skin — an essential trace mineral that the body uses to make antioxidant enzymes such as glutathione peroxidase, which help protect cells from oxidative stress. In relation to skin it supports the body's natural antioxidant defenses, and selenium-rich thermal spring waters have long been used for their soothing reputation. It is needed only in very small amounts and is mainly obtained through diet. - Shea Butter: https://www.syncbeauty.com/blogs/encyclopedia/shea-butter Shea Butter — a rich, semi-solid fat extracted from the nuts of the African shea tree, packed with fatty acids and vitamins that deeply moisturize and soften skin. It is a classic emollient used to relieve dryness and support the skin's protective barrier. - Signal Peptides: https://www.syncbeauty.com/blogs/encyclopedia/signal-peptides Signal Peptides — a class of peptides that act as messengers, prompting skin cells to carry out processes such as producing collagen and other structural proteins. They are among the most common peptides in anti-aging formulas because they aim to support skin firmness without exfoliating or irritating. Palmitoyl pentapeptides are well-known examples. - Snail Mucin (Snail Secretion Filtrate): https://www.syncbeauty.com/blogs/encyclopedia/snail-mucin-snail-secretion-filtrate Snail Mucin (Snail Secretion Filtrate) — a filtered form of the mucus secreted by snails, standardized for cosmetic use and listed on labels as snail secretion filtrate. It contains a mix of glycoproteins, hyaluronic acid, glycolic acid, and other compounds, and is popular in hydrating and skin-conditioning products, particularly within Korean skincare. - Snow Mushroom Extract: https://www.syncbeauty.com/blogs/encyclopedia/snow-mushroom-extract Snow Mushroom Extract — a hydrating botanical, derived from the Tremella fuciformis mushroom, that is rich in water-binding polysaccharides. Often compared to hyaluronic acid, it helps draw and hold moisture in the skin for a plump, smooth appearance. - Sodium Ascorbyl Phosphate: https://www.syncbeauty.com/blogs/encyclopedia/sodium-ascorbyl-phosphate Sodium Ascorbyl Phosphate — a water-soluble, salt-based derivative of vitamin C prized for its stability, gently converting to active ascorbic acid in the skin to provide antioxidant and brightening benefits. It is often chosen for sensitive skin and is studied for its potential to support clearer, more even-looking skin. - Sodium Hyaluronate: https://www.syncbeauty.com/blogs/encyclopedia/sodium-hyaluronate Sodium Hyaluronate — the sodium salt of hyaluronic acid, a form that is more stable and typically has a smaller molecular size. This makes it a common ingredient choice that spreads easily and delivers humectant hydration into the skin. - Sodium Lactate: https://www.syncbeauty.com/blogs/encyclopedia/sodium-lactate Sodium Lactate — the sodium salt of lactic acid and a key component of the skin's natural moisturizing factor (NMF), the built-in blend that keeps the surface hydrated. As a humectant it draws and holds water in the upper layers of skin, and it also has mild buffering and antimicrobial properties that make it a versatile formulation ingredient. It is commonly paired with other NMF components to boost long-lasting hydration. - Squalane: https://www.syncbeauty.com/blogs/encyclopedia/squalane Squalane — a lightweight, saturated oil derived by hydrogenating squalene, most often sourced today from olives, sugarcane, or other plants. Its stability and non-greasy feel make it a popular emollient that softens skin and helps reduce moisture loss. - Squalane vs Plant Oils Overview: https://www.syncbeauty.com/blogs/encyclopedia/squalane-vs-plant-oils-overview Squalane vs Plant Oils Overview — a comparison between squalane, a saturated and highly stable lightweight emollient, and plant oils, which are triglyceride-rich botanical oils with varied fatty acid profiles. Both soften and condition skin, but they differ in texture, stability, and how they behave on different skin types. - Squalene: https://www.syncbeauty.com/blogs/encyclopedia/squalene Squalene — a natural lipid produced by the skin's sebaceous glands and a component of the skin's protective surface oils. Because it oxidizes easily in its natural form, skincare products typically use its more stable derivative, squalane. - Sulfur in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/sulfur-in-skincare Sulfur in Skincare — a naturally occurring mineral used topically in cleansers, masks, and spot treatments to help manage acne, rosacea, and seborrheic dermatitis. It works mainly by gently exfoliating, absorbing excess oil, and reducing the growth of acne-associated bacteria and Malassezia yeast. - Sunflower Seed Oil: https://www.syncbeauty.com/blogs/encyclopedia/sunflower-seed-oil Sunflower Seed Oil — a lightweight, widely used plant oil high in linoleic acid, a fatty acid important for a healthy skin barrier. It is valued as a gentle emollient that helps reduce moisture loss and is often found in products for dry or sensitive skin. - Tartaric Acid: https://www.syncbeauty.com/blogs/encyclopedia/tartaric-acid Tartaric Acid — an alpha hydroxy acid found in grapes that offers gentle exfoliation and also helps stabilize the pH of acid formulations. It is often included in blends both for its mild exfoliating effect and its ability to buffer other acids so they perform consistently. Its larger molecule makes it relatively gentle on the skin. - Tazarotene: https://www.syncbeauty.com/blogs/encyclopedia/tazarotene Tazarotene — a potent synthetic retinoid used by prescription for acne, psoriasis, and signs of photoaging. It is converted in the skin to its active form, tazarotenic acid, and is regarded as one of the stronger topical retinoids available. - Tea Tree Oil: https://www.syncbeauty.com/blogs/encyclopedia/tea-tree-oil Tea Tree Oil — an essential oil steam-distilled from the leaves of the Australian Melaleuca alternifolia plant, valued in skincare for its antimicrobial and anti-inflammatory properties. It is most often used in diluted form to help calm blemishes and support oily, acne-prone skin. - Tetrahexyldecyl Ascorbate: https://www.syncbeauty.com/blogs/encyclopedia/tetrahexyldecyl-ascorbate Tetrahexyldecyl Ascorbate — an oil-soluble, highly stable vitamin C derivative that penetrates the skin's lipid layers well and converts to active ascorbic acid, delivering antioxidant and brightening benefits. It is often used in anhydrous or oil-based formulas and is valued for its resistance to oxidation. - Time-Release Actives: https://www.syncbeauty.com/blogs/encyclopedia/time-release-actives Time-Release Actives — ingredients formulated with delivery technologies that release the active gradually over a period of time rather than all at once. This approach aims to provide a steadier exposure to the ingredient, which can support tolerability and help maintain formula performance. - Titanium Dioxide: https://www.syncbeauty.com/blogs/encyclopedia/titanium-dioxide Titanium Dioxide — a mineral compound used as a broad-spectrum physical sunscreen filter that reflects, scatters, and absorbs ultraviolet light to protect the skin. It offers strong protection particularly in the UVB and shorter UVA range and is well regarded for being gentle and suitable for sensitive skin. - Tranexamic Acid: https://www.syncbeauty.com/blogs/encyclopedia/tranexamic-acid Tranexamic Acid — a synthetic derivative of the amino acid lysine used topically to help fade discoloration and even skin tone. It is thought to interrupt the interaction between skin cells and pigment-producing melanocytes, making it a popular choice for melasma and post-inflammatory hyperpigmentation. - Trehalose: https://www.syncbeauty.com/blogs/encyclopedia/trehalose Trehalose — a naturally occurring sugar that acts as a humectant and helps protect skin cells against dehydration and environmental stress. It is used in skincare to draw in moisture and support the skin barrier, particularly under dry or harsh conditions. - Tretinoin (Retinoic Acid): https://www.syncbeauty.com/blogs/encyclopedia/tretinoin-retinoic-acid Tretinoin (Retinoic Acid) — the biologically active form of vitamin A that binds directly to retinoid receptors in the skin without needing conversion. Available by prescription in many regions, it is one of the most extensively studied topical ingredients for photoaging and acne. - Turmeric (Curcumin): https://www.syncbeauty.com/blogs/encyclopedia/turmeric-curcumin Turmeric (Curcumin) — a golden spice derived from the Curcuma longa root whose primary active compound, curcumin, is studied for its antioxidant and soothing properties. In skincare it is used to help calm the look of redness and support a brighter, more even-toned complexion. - Urea: https://www.syncbeauty.com/blogs/encyclopedia/urea Urea — a component of the skin's own natural moisturizing factor that works as both a humectant and, at higher concentrations, a mild exfoliant. It helps skin hold water at low levels and can soften and smooth rough, thickened, or dry skin at higher levels. - Vitamin A Overview: https://www.syncbeauty.com/blogs/encyclopedia/vitamin-a-overview Vitamin A Overview — a family of fat-soluble compounds, known as retinoids, that includes retinol, retinaldehyde, retinyl esters, and prescription forms like tretinoin. In skincare, vitamin A derivatives are studied for their influence on skin cell turnover and the appearance of fine lines, uneven tone, and texture. - Vitamin B12 in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/vitamin-b12-in-skincare Vitamin B12 in Skincare — a cobalt-containing member of the B-vitamin family, also known as cobalamin, that is essential for cell metabolism throughout the body. In skincare it appears as a conditioning ingredient and has been studied topically in the context of dry, irritated skin, and it also gives formulas a distinctive pink tint. Most of the body's vitamin B12 needs are met through diet rather than topical products. - Vitamin B5 (Panthenol): https://www.syncbeauty.com/blogs/encyclopedia/vitamin-b5-panthenol Vitamin B5 (Panthenol) — the provitamin form of vitamin B5, known as panthenol, that converts to pantothenic acid in the skin and acts as a humectant to attract and hold moisture. It is widely used to soothe, hydrate, and support the skin barrier. - Vitamin C in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/vitamin-c-in-skincare Vitamin C in Skincare — a potent antioxidant that protects skin from free-radical damage, supports collagen synthesis and brightens uneven tone. L-ascorbic acid is the most researched form, though gentler derivatives exist for sensitive skin. - Vitamin E (Tocopherol): https://www.syncbeauty.com/blogs/encyclopedia/vitamin-e-tocopherol Vitamin E (Tocopherol) — a fat-soluble antioxidant, commonly listed as tocopherol, that helps protect skin from free-radical damage while contributing to moisture and barrier support. It is frequently paired with vitamin C to enhance overall antioxidant performance. - Vitamin F (Essential Fatty Acids): https://www.syncbeauty.com/blogs/encyclopedia/vitamin-f-essential-fatty-acids Vitamin F (Essential Fatty Acids) — a traditional name for essential fatty acids, primarily linoleic acid (omega-6) and alpha-linolenic acid (omega-3), that the body cannot synthesize on its own. In skincare these lipids help reinforce the skin barrier, support moisture retention, and soften the look of dry, rough patches. - Vitamin K in Skincare: https://www.syncbeauty.com/blogs/encyclopedia/vitamin-k-in-skincare Vitamin K in Skincare — a fat-soluble vitamin, most often used topically as phytonadione, that is studied for its role in skin recovery and its traditional association with the appearance of bruising and under-eye discoloration. Evidence for its topical benefits is more limited than for vitamins C and E. - Willow Bark Extract: https://www.syncbeauty.com/blogs/encyclopedia/willow-bark-extract Willow Bark Extract — a botanical extract derived from the bark of willow trees that naturally contains salicin, a compound related to salicylic acid, giving it mild exfoliating and soothing properties. It is often used in clean formulations as a gentler, plant-derived alternative to synthetic BHA. - Zinc Oxide: https://www.syncbeauty.com/blogs/encyclopedia/zinc-oxide Zinc Oxide — a mineral compound used as a broad-spectrum physical sunscreen filter and gentle skin protectant that sits on the skin's surface to reflect and scatter UV light. It is one of the most widely used mineral UV filters, valued for protecting against both UVA and UVB rays while being well tolerated by sensitive skin. - Zinc PCA: https://www.syncbeauty.com/blogs/encyclopedia/zinc-pca Zinc PCA — the zinc salt of pyrrolidone carboxylic acid (PCA), a multifunctional ingredient that combines zinc with a natural moisturizing factor found in skin. It is used to help balance the look of oiliness, provide light hydration, and support a clearer, more comfortable complexion. ## Product Types (76) What each product category is for — cleansers, serums, moisturisers, SPF, lip and brow products. - Actives Booster: https://www.syncbeauty.com/blogs/encyclopedia/actives-booster Actives Booster — a concentrated treatment product that delivers a high dose of one or a few functional ingredients, such as vitamin C, niacinamide, or exfoliating acids, to target a specific concern. It is typically layered under a moisturizer or mixed into an existing routine to reinforce results without replacing core steps. - Ampoule: https://www.syncbeauty.com/blogs/encyclopedia/ampoule Ampoule — a highly concentrated treatment product, often described as a more potent or booster version of a serum. It usually contains a high percentage of active ingredients and is intended for short-term, targeted use to address concerns like dryness, dullness, or the appearance of fatigue, though the term is used loosely across brands. - Balm Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/balm-cleanser Balm Cleanser — a solid, oil-based cleanser that melts into a silky oil on contact with skin, dissolving makeup, sunscreen, and sebum before emulsifying and rinsing away with water. Its concentrated, low-mess texture makes it a popular first-cleanse option, especially for removing long-wear makeup. - Barrier Repair Cream: https://www.syncbeauty.com/blogs/encyclopedia/barrier-repair-cream Barrier Repair Cream — a moisturizer designed to reinforce the skin's outermost layer by replenishing lipids and supporting its natural protective function. These creams typically feature ingredients that mimic the skin's own composition, helping to reduce water loss and soothe dryness, tightness, or sensitivity. They are often used when the barrier feels compromised from over-exfoliation, weather, or harsh products. - Body Butter: https://www.syncbeauty.com/blogs/encyclopedia/body-butter Body Butter — a rich, thick moisturizer built around a high concentration of plant butters and oils to deeply soften and seal dry skin. Its dense, occlusive texture makes it well suited to very dry or rough areas that need more intensive nourishment. - Body Lotion: https://www.syncbeauty.com/blogs/encyclopedia/body-lotion Body Lotion — a fluid moisturizer with a relatively high water content designed to hydrate the skin of the body and spread easily over large areas. It blends water, humectants, and emollients into a lightweight emulsion that absorbs quickly for everyday use. - Body Oil: https://www.syncbeauty.com/blogs/encyclopedia/body-oil Body Oil — an anhydrous moisturizing product made from blends of plant or synthetic oils that condition the skin and impart a smooth, supple finish. Applied to the body, it delivers emollients and can help seal in existing moisture, especially over damp skin. - Body Wash: https://www.syncbeauty.com/blogs/encyclopedia/body-wash Body Wash — a liquid cleanser formulated to remove dirt, sweat, and oil from the skin of the body during bathing or showering. It uses surfactants to lift away debris and is often supplemented with humectants or emollients to reduce the drying effect of cleansing. - Brow Gel: https://www.syncbeauty.com/blogs/encyclopedia/brow-gel Brow Gel — a grooming product that shapes, sets, and holds eyebrow hairs in place, typically applied with a small spoolie brush. It can be clear or tinted and is used to keep brows looking neat and defined throughout the day. Brow gels focus on styling and hold rather than long-term hair conditioning. - Brow Serum: https://www.syncbeauty.com/blogs/encyclopedia/brow-serum Brow Serum — a leave-on treatment applied to the brows and often marketed to support the look of fuller, healthier-appearing eyebrows over time. Unlike styling gels, brow serums focus on conditioning the brow area with ingredients such as peptides, panthenol, and botanical extracts. Results, when described, are generally gradual and vary by individual and formula. - Chemical Exfoliant: https://www.syncbeauty.com/blogs/encyclopedia/chemical-exfoliant Chemical Exfoliant — a product that uses acids or other active compounds to loosen the bonds between dead surface cells so they shed more easily, without manual scrubbing. Common types include alpha hydroxy acids, beta hydroxy acids, and polyhydroxy acids, each working on the skin's surface or within pores. - Chemical Sunscreen: https://www.syncbeauty.com/blogs/encyclopedia/chemical-sunscreen Chemical Sunscreen — a sunscreen that uses organic (carbon-based) UV filters, such as avobenzone or octocrylene, that absorb ultraviolet radiation and convert it into a small amount of heat. These formulas tend to be lightweight and blend easily without leaving a white cast. - Cica Cream: https://www.syncbeauty.com/blogs/encyclopedia/cica-cream Cica Cream — a soothing moisturizer named for Centella asiatica, a botanical also known as tiger grass or gotu kola, valued in skincare for its calming properties. These creams are often used to comfort redness, irritation, and dryness, and are popular in routines focused on sensitive or stressed skin. The term cica broadly signals a soothing, recovery-oriented formula. - Clay Mask: https://www.syncbeauty.com/blogs/encyclopedia/clay-mask Clay Mask — a rinse-off treatment built around mineral clays such as kaolin or bentonite that bind to oil and surface debris as they dry. It is used mainly to absorb excess sebum and temporarily reduce the look of shine and enlarged pores, particularly on oily or combination skin. - Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/cleanser Cleanser — a foundational skincare product formulated to remove dirt, oil, sweat, makeup, and pollutants from the skin's surface. Available in many textures, it is the first step in most routines and prepares skin for the products that follow. - Cleansing Oil vs Balm Overview: https://www.syncbeauty.com/blogs/encyclopedia/cleansing-oil-vs-balm-overview Cleansing Oil vs Balm Overview — a comparison of two oil-based cleansers that dissolve makeup, sunscreen, and excess sebum before rinsing away or being followed by a second cleanse. Cleansing oils are liquid and spread easily, while cleansing balms start as a solid that melts into oil on contact with skin. Both work on the principle that oil dissolves oil, and the choice often comes down to texture preference and skin type. - Cleansing Wipes: https://www.syncbeauty.com/blogs/encyclopedia/cleansing-wipes Cleansing Wipes — pre-moistened disposable cloths saturated with cleansing agents that wipe away makeup, oil, and surface grime without water. They offer convenience for travel, gym, or on-the-go use, though they generally cleanse less thoroughly than a rinse-off cleanser and can leave residue behind. - Cream: https://www.syncbeauty.com/blogs/encyclopedia/cream Cream — a moisturizer with an emulsified blend of water and oil that hydrates while helping to soften and smooth the skin surface. Creams generally offer more emollient and occlusive properties than gels or lotions, sealing in moisture and supporting the skin barrier across a wide range of skin types. - Cream Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/cream-cleanser Cream Cleanser — a rich, lotion-like facial cleanser that blends emollients and mild surfactants to lift away impurities while leaving a soft, conditioned feel. Its low-foaming, moisturizing texture makes it a common choice for dry, sensitive, or mature skin that reacts poorly to stripping formulas. - Cream Mask: https://www.syncbeauty.com/blogs/encyclopedia/cream-mask Cream Mask — a rich, leave-and-rinse treatment with a thick, emollient texture designed to deliver moisture and comfort to the skin. It typically contains humectants, emollients, and soothing ingredients, making it a common choice for dry, dehydrated, or sensitive skin. - Day Cream: https://www.syncbeauty.com/blogs/encyclopedia/day-cream Day Cream — a moisturizer designed for morning use that hydrates while layering easily under sunscreen and makeup. Day formulas tend to be lighter than night creams and frequently include antioxidants, and sometimes SPF, to help protect skin against daytime environmental stressors. - Double Cleansing: https://www.syncbeauty.com/blogs/encyclopedia/double-cleansing Double Cleansing — a two-step cleansing method that begins with an oil-based cleanser to dissolve makeup, sunscreen, and sebum, followed by a water-based cleanser to remove sweat, debris, and any remaining residue. The technique aims for a thorough yet balanced cleanse and is especially useful after wearing heavy makeup or SPF. - Emulsion: https://www.syncbeauty.com/blogs/encyclopedia/emulsion Emulsion — a lightweight, milky moisturizer that blends water and oil into a fluid, easily absorbed texture. Common in Korean and Japanese routines, it provides hydration and light conditioning without the heaviness of a cream, making it a popular choice for normal, combination, or oily skin. - Enzyme Exfoliant: https://www.syncbeauty.com/blogs/encyclopedia/enzyme-exfoliant Enzyme Exfoliant — a treatment that uses enzymes, often derived from fruit such as papaya or pineapple, to break down the proteins binding dead cells to the skin's surface. It is generally considered one of the gentlest exfoliation methods, working through protein digestion rather than acids or abrasion. - Essence: https://www.syncbeauty.com/blogs/encyclopedia/essence Essence — a lightweight, water-like liquid used after cleansing and toning to deliver hydration and active ingredients to the skin. Popularized in Korean and Japanese routines, it sits between a toner and a serum in texture and is meant to boost moisture and help condition skin before heavier steps. - Exfoliating Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/exfoliating-cleanser Exfoliating Cleanser — a cleanser that combines surface cleansing with an exfoliating action, using either physical particles or chemical agents such as AHAs, BHAs, or enzymes to loosen dead skin cells. It is designed to smooth texture and brighten skin in one step, but should be used with restraint to avoid over-exfoliation. - Exfoliating Toner: https://www.syncbeauty.com/blogs/encyclopedia/exfoliating-toner Exfoliating Toner — a liquid formula applied after cleansing that uses chemical exfoliants such as AHAs, BHAs, or PHAs to loosen and remove dead surface skin cells. It is designed to smooth texture, brighten dull skin, and support the penetration of subsequent products, and is typically used a few times per week rather than daily. - Eye Cream: https://www.syncbeauty.com/blogs/encyclopedia/eye-cream Eye Cream — a moisturizer formulated specifically for the delicate skin around the eyes, which is thinner and more prone to dryness, puffiness, and fine lines. It is typically gentle and fragrance-conscious, and may include targeted ingredients such as peptides, caffeine, niacinamide, or hyaluronic acid for hydration and a smoother look. - Eye Mask (Patches): https://www.syncbeauty.com/blogs/encyclopedia/eye-mask-patches Eye Mask (Patches) — single-use patches applied under the eyes to deliver a concentrated dose of hydrating or soothing ingredients over a short wear time, usually ten to twenty minutes. Often made from gel, hydrogel, or fabric soaked in serum, they are used as an occasional boost to temporarily refresh, cool, and plump the look of the under-eye area. - Eye Serum: https://www.syncbeauty.com/blogs/encyclopedia/eye-serum Eye Serum — a lightweight, fast-absorbing treatment for the eye area that delivers concentrated active ingredients in a fluid, often water-based texture. It typically layers under an eye cream or moisturizer and focuses on targeted concerns such as hydration, dark circles, or the look of fine lines and puffiness. - Face Mist: https://www.syncbeauty.com/blogs/encyclopedia/face-mist Face Mist — a lightweight, sprayable liquid applied to the face to add a quick burst of hydration, refreshment, or a delivery of soothing or antioxidant ingredients. Formulas range from simple water-based sprays to those enriched with humectants, botanical extracts, or thermal water. - Face Oil: https://www.syncbeauty.com/blogs/encyclopedia/face-oil Face Oil — an oil-based product made from plant, seed, or nut oils that is applied to help soften skin and reduce moisture loss. Because oils are largely occlusive and emollient, a face oil is generally used toward the end of a routine to seal in hydration and improve the feel and appearance of the skin's surface. - Facial in a Bottle: https://www.syncbeauty.com/blogs/encyclopedia/facial-in-a-bottle Facial in a Bottle — a marketing term for a single product that promises multiple facial-like benefits at once, such as exfoliating, brightening, hydrating, or smoothing the skin. It usually refers to a concentrated treatment like a mask, serum, or peel rather than a standardized category with a fixed formula. - First Treatment Essence: https://www.syncbeauty.com/blogs/encyclopedia/first-treatment-essence First Treatment Essence — a type of essence designed to be the first liquid step applied to freshly cleansed skin, often before other toners or treatments. These formulas are frequently built around fermented ingredients and are marketed to hydrate, soften, and help prime the skin so that following products absorb more readily. - Foaming Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/foaming-cleanser Foaming Cleanser — a type of face wash that uses surfactants to generate a lather, lifting away oil, sweat, and impurities before rinsing clean. It typically leaves a lightweight, fresh finish that many with oily or combination skin prefer. - Foot Cream: https://www.syncbeauty.com/blogs/encyclopedia/foot-cream Foot Cream — a moisturizer designed for the feet, where thicker skin and pressure often lead to dryness, roughness, and calluses. It is usually richer and more occlusive than facial moisturizers and may include softening or gently exfoliating ingredients like urea. - Gel Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/gel-cleanser Gel Cleanser — a water-based facial cleanser with a lightweight, translucent gel texture that lathers to lift away oil, sweat, sunscreen, and surface debris. It typically uses gentle surfactants and suits normal, combination, and oily skin because it removes excess sebum without leaving a heavy residue. - Gel Moisturizer: https://www.syncbeauty.com/blogs/encyclopedia/gel-moisturizer Gel Moisturizer — a lightweight, water-based moisturizer with a translucent, jelly-like texture that absorbs quickly and leaves little to no greasy residue. It typically relies on humectants such as glycerin or hyaluronic acid to hydrate, with minimal heavy oils, making it well suited to oily and combination skin or warm, humid climates. - Gel-Cream: https://www.syncbeauty.com/blogs/encyclopedia/gel-cream Gel-Cream — a hybrid moisturizer that blends the fast-absorbing, water-rich feel of a gel with the cushioning, longer-lasting hydration of a cream. It aims to deliver more moisture than a pure gel while staying lighter and less occlusive than a traditional cream, making it a versatile option for normal and combination skin. - Hand Cream: https://www.syncbeauty.com/blogs/encyclopedia/hand-cream Hand Cream — a moisturizer formulated specifically for the hands, which face frequent washing, friction, and environmental exposure. It typically combines humectants and emollients, and often occlusives, to relieve dryness and support the skin barrier on the hands. - How to Choose a Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/how-to-choose-a-cleanser How to Choose a Cleanser — the step of selecting a face wash that removes oil, dirt, sunscreen and makeup without stripping the skin barrier. The right cleanser depends on your skin type and what you need it to remove. - Hydrating Mist: https://www.syncbeauty.com/blogs/encyclopedia/hydrating-mist Hydrating Mist — a lightweight, water-based spray formulated with humectants like glycerin, hyaluronic acid, or aloe to add surface moisture and a refreshed feel throughout the day. It is used as a quick hydration step and can help subsequent products spread more evenly, though it does not replace a moisturizer. - Hydrating Toner: https://www.syncbeauty.com/blogs/encyclopedia/hydrating-toner Hydrating Toner — a water-based liquid applied after cleansing to add lightweight moisture and help prepare skin for the products that follow. It typically relies on humectants such as glycerin or hyaluronic acid to draw water into the upper layers of skin, leaving it feeling soft and replenished rather than tight. - Lip Balm: https://www.syncbeauty.com/blogs/encyclopedia/lip-balm Lip Balm — a waxy or oily product applied to the lips to soften them, seal in moisture, and protect the delicate skin from dryness and environmental exposure. Formulas often combine occlusives and emollients, and some include SPF for daytime sun protection. - Lip Mask: https://www.syncbeauty.com/blogs/encyclopedia/lip-mask Lip Mask — a leave-on treatment product formulated to condition and hydrate the lips over an extended period, often worn overnight. It typically layers occlusive and emollient ingredients over the thin skin of the lips to reduce moisture loss and soften dryness or flaking. - Lip Oil: https://www.syncbeauty.com/blogs/encyclopedia/lip-oil Lip Oil — a lightweight lip product built on a base of nourishing oils that adds a glossy, non-sticky sheen while conditioning the lips. It delivers emollients that soften and smooth the surface, offering a more comfortable feel than traditional high-shine glosses. - Lip Scrub: https://www.syncbeauty.com/blogs/encyclopedia/lip-scrub Lip Scrub — a gentle exfoliating product that uses fine physical particles or mild acids to loosen and remove dry, flaking skin from the lips. It is typically massaged on and then wiped or rinsed away to leave the lip surface smoother before applying balm or color. - Lip Treatment (SPF): https://www.syncbeauty.com/blogs/encyclopedia/lip-treatment-spf Lip Treatment (SPF) — a lip care product that combines conditioning emollients with sunscreen filters to shield the lips from ultraviolet radiation. Because the lips have little natural melanin and a thin barrier, an SPF lip treatment helps protect this vulnerable area from sun-related damage. - Lotion (Face): https://www.syncbeauty.com/blogs/encyclopedia/lotion-face Lotion (Face) — a fluid, lightweight moisturizer for the face that typically contains more water than an oil-rich cream, giving it a thinner, fast-absorbing texture. Terminology varies by region, and in some skincare traditions the word refers to a watery hydrating liquid closer to a toner, so labels and formulas should be checked individually. - Micellar Water: https://www.syncbeauty.com/blogs/encyclopedia/micellar-water Micellar Water — a no-rinse cleansing liquid made of water suspended with tiny surfactant clusters called micelles that attract and lift away oil, dirt, and makeup on contact. Applied with a cotton pad, it cleanses gently without foaming, making it a convenient option for quick or low-water routines. - Micro-Needling Serum (At-Home): https://www.syncbeauty.com/blogs/encyclopedia/micro-needling-serum-at-home Micro-Needling Serum (At-Home) — a serum used alongside an at-home micro-needling tool, such as a dermaroller, to complement the process of creating tiny channels in the skin's surface. These serums are typically formulated with hydrating and soothing ingredients suited to freshly needled skin, while harsher actives are usually avoided. At-home devices are shallower than professional treatments, and hygiene and technique are central to safe use. - Mineral Sunscreen: https://www.syncbeauty.com/blogs/encyclopedia/mineral-sunscreen Mineral Sunscreen — a sunscreen that uses mineral UV filters, zinc oxide and titanium dioxide, to help protect skin from ultraviolet rays. These filters sit largely on the skin's surface and are sometimes called physical or inorganic sunscreens. - Moisturizer: https://www.syncbeauty.com/blogs/encyclopedia/moisturizer Moisturizer — a product formulated to hydrate the skin and reduce water loss, helping to keep the surface soft, comfortable, and supported. It typically combines humectants that attract water, emollients that smooth the skin, and occlusives that help seal in moisture, and is a core step in most daily skincare routines. - Neck Cream: https://www.syncbeauty.com/blogs/encyclopedia/neck-cream Neck Cream — a moisturizer formulated for the thinner, more delicate skin of the neck and décolletage, often combining hydrators, antioxidants, and firming actives. Because neck skin has fewer oil glands and is prone to visible creping and horizontal lines, these creams typically emphasize barrier support and elasticity. They are used as an extension of a facial routine rather than a substitute for it. - Night Cream: https://www.syncbeauty.com/blogs/encyclopedia/night-cream Night Cream — a moisturizer formulated for nighttime use, typically richer than a day cream and focused on hydration, comfort, and supporting the skin's overnight recovery. Because it does not need to sit under sunscreen or makeup, it often contains more emollients and targeted actives such as retinoids, peptides, or antioxidants. - Oil Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/oil-cleanser Oil Cleanser — a cleanser made primarily from oils that dissolve oil-based impurities such as makeup, sunscreen, and excess sebum through the principle that like dissolves like. Many are formulated with emulsifiers so they rinse cleanly into a milky wash when massaged with water, leaving skin comfortable rather than greasy. - Overnight Mask: https://www.syncbeauty.com/blogs/encyclopedia/overnight-mask Overnight Mask — a leave-on treatment, sometimes called a sleeping mask, applied as the final step before bed and worn until morning. It usually contains hydrating and often occlusive ingredients that help seal in moisture and support the skin's natural overnight recovery. - Peel-Off Mask: https://www.syncbeauty.com/blogs/encyclopedia/peel-off-mask Peel-Off Mask — a treatment applied as a liquid or gel that dries into a flexible film, which is then lifted away from the skin in one piece. Removing the film takes loose surface debris and dead skin flakes with it, leaving a temporarily smoother, brighter surface feel. - Peeling Solution: https://www.syncbeauty.com/blogs/encyclopedia/peeling-solution Peeling Solution — a concentrated leave-on or timed-rinse product containing a higher percentage of exfoliating acids, intended to deliver a stronger resurfacing effect than everyday exfoliants. It is typically used occasionally to smooth texture and even tone, and requires careful attention to timing and skin tolerance. - Physical Exfoliant (Scrub): https://www.syncbeauty.com/blogs/encyclopedia/physical-exfoliant-scrub Physical Exfoliant (Scrub) — a product that removes dead surface cells through mechanical action, using textured particles, granules, or a tool to buff the skin. Unlike acids, it works by manual friction, so the exfoliation happens as you massage the product across the skin. - Pimple Patch: https://www.syncbeauty.com/blogs/encyclopedia/pimple-patch Pimple Patch — a small, usually hydrocolloid, adhesive sticker placed over a blemish to absorb fluid, protect it from picking, and create a moist environment that can support faster surface healing. Some versions add ingredients such as salicylic acid or contain fine microneedles designed to deliver actives into a raised spot. - Powder Cleanser: https://www.syncbeauty.com/blogs/encyclopedia/powder-cleanser Powder Cleanser — a waterless, powder-format cleanser that activates when mixed with water in the palm, transforming into a foam or paste. Because the formula is anhydrous, it often contains enzymes or gentle exfoliants that stay stable until use, offering a mild cleanse with light exfoliation. - Retinol Cream: https://www.syncbeauty.com/blogs/encyclopedia/retinol-cream Retinol Cream — a leave-on moisturizer containing retinol, a vitamin A derivative that supports skin cell turnover and the appearance of smoother, more even skin. It combines the exfoliating and collagen-supporting benefits of a retinoid with the emollients of a cream base, which can help buffer potential irritation. It is generally used at night as part of a longer-term routine. - Rich Cream: https://www.syncbeauty.com/blogs/encyclopedia/rich-cream Rich Cream — a densely emollient moisturizer formulated with a higher proportion of oils, butters, and occlusives to deliver intensive hydration and barrier support. It is designed to reduce moisture loss and soften rough, tight, or flaky skin, making it best suited to dry, mature, or barrier-compromised complexions and colder, drier conditions. - Serum: https://www.syncbeauty.com/blogs/encyclopedia/serum Serum — a concentrated, lightweight formula designed to deliver a high level of active ingredients to target specific concerns such as dullness, uneven tone, or signs of aging. Applied after cleansing and before moisturizer, it typically absorbs quickly and is formulated to address particular goals rather than provide broad surface hydration alone. - Setting Mist: https://www.syncbeauty.com/blogs/encyclopedia/setting-mist Setting Mist — a fine spray applied over finished makeup to help it stay in place, blend a powdery finish into skin, and reduce a cakey appearance. Many formulas include film-forming ingredients that create a light, flexible layer to improve wear time. - Sheet Mask: https://www.syncbeauty.com/blogs/encyclopedia/sheet-mask Sheet Mask — a single-use facial treatment made from a thin sheet of cotton, hydrogel, or bio-cellulose that is saturated with a serum-like essence and pressed onto the face for a set period. The occlusive sheet slows evaporation, helping water and active ingredients absorb into the skin's surface while it sits in place. - Sleeping Mask: https://www.syncbeauty.com/blogs/encyclopedia/sleeping-mask Sleeping Mask — a leave-on treatment applied as the final step of an evening routine and worn overnight to boost hydration and support the skin's natural repair processes during sleep. Unlike rinse-off masks, it stays on until morning, often forming a light seal that helps deliver active ingredients and reduce moisture loss. - SPF Powder: https://www.syncbeauty.com/blogs/encyclopedia/spf-powder SPF Powder — a loose or pressed powder containing mineral UV filters, marketed to help refresh sun protection over makeup during the day. It is typically applied with a brush and is best viewed as a top-up rather than a primary source of sun protection. - Spot Treatment: https://www.syncbeauty.com/blogs/encyclopedia/spot-treatment Spot Treatment — a targeted product applied directly to an individual blemish rather than across the whole face. It usually contains a concentrated active such as salicylic acid, benzoyl peroxide, or sulfur to address a specific spot while limiting the effect on surrounding skin. - Sunscreen (SPF): https://www.syncbeauty.com/blogs/encyclopedia/sunscreen-spf Sunscreen (SPF) — a topical product that helps protect skin from ultraviolet radiation, with SPF (Sun Protection Factor) indicating how well it guards against UVB rays that cause sunburn. Broad-spectrum formulas also help defend against UVA rays, which contribute to skin aging and long-term damage. - Tinted Brow Gel: https://www.syncbeauty.com/blogs/encyclopedia/tinted-brow-gel Tinted Brow Gel — a pigmented version of brow gel that adds color while shaping and setting the eyebrows in one step. It combines subtle tint to fill gaps and define the brow with a holding formula that keeps hairs in place. It is popular for a quick, natural-looking brow finish without separate filling products. - Tinted Sunscreen: https://www.syncbeauty.com/blogs/encyclopedia/tinted-sunscreen Tinted Sunscreen — a sunscreen that includes cosmetic pigments to add a hint of color while providing UV protection. The tint evens out skin tone, can reduce the white cast of mineral filters, and often includes iron oxides that help shield against visible light. - Toner: https://www.syncbeauty.com/blogs/encyclopedia/toner Toner — a water-based liquid applied after cleansing to prepare, hydrate, or treat the skin depending on its formulation. Modern toners have moved beyond the astringent, alcohol-heavy versions of the past and now range from hydrating and soothing to gently exfoliating. - Understanding Serums: https://www.syncbeauty.com/blogs/encyclopedia/understanding-serums Understanding Serums — lightweight, concentrated formulas designed to deliver a high dose of active ingredients — such as antioxidants, hydrators or exfoliants — deeper and faster than a moisturiser. They are applied after cleansing and before moisturiser. - Vitamin C Serum (Format Guide): https://www.syncbeauty.com/blogs/encyclopedia/vitamin-c-serum-format-guide Vitamin C Serum (Format Guide) — a concentrated leave-on treatment delivering vitamin C, an antioxidant used to help brighten skin tone and defend against free radical damage. Formats vary by the form of vitamin C used, such as L-ascorbic acid or gentler derivatives, and by the base, which affects stability, potency, and how well different skin types tolerate it. Choosing a format often comes down to balancing strength, texture, and packaging that protects the ingredient from air and light.
