Skin Encyclopedia

An evidence-based skincare reference by SYNC Beauty.

Encyclopedia

Keratinocyte

the most abundant cell type in the epidermis, responsible for producing keratin, a tough structural protein that helps form the skin's protective barrier. These cells move upward from the base...

Keratinocyte

the most abundant cell type in the epidermis, responsible for producing keratin, a tough structural protein that helps form the skin's protective barrier. These cells move upward from the base...

Hypodermis

the deepest layer of skin, also called the subcutaneous layer or subcutis, made up largely of fat and connective tissue beneath the dermis. It cushions the body, insulates against heat...

Hypodermis

the deepest layer of skin, also called the subcutaneous layer or subcutis, made up largely of fat and connective tissue beneath the dermis. It cushions the body, insulates against heat...

Dermis

the thick middle layer of skin that sits beneath the epidermis and above the hypodermis, providing structural strength, elasticity, and nourishment. It houses collagen and elastin fibers, blood vessels, nerve...

Dermis

the thick middle layer of skin that sits beneath the epidermis and above the hypodermis, providing structural strength, elasticity, and nourishment. It houses collagen and elastin fibers, blood vessels, nerve...

Epidermis

the outermost of the skin's main layers, a cell-rich tissue that forms the body's protective barrier and continually renews itself from the bottom up. It has no direct blood supply...

Epidermis

the outermost of the skin's main layers, a cell-rich tissue that forms the body's protective barrier and continually renews itself from the bottom up. It has no direct blood supply...

Stratum Corneum

the outermost layer of the epidermis, made of flattened, non-living skin cells embedded in a matrix of barrier lipids. Often described as a brick-and-mortar structure, it is the skin's primary...

Stratum Corneum

the outermost layer of the epidermis, made of flattened, non-living skin cells embedded in a matrix of barrier lipids. Often described as a brick-and-mortar structure, it is the skin's primary...

Natural Moisturizing Factor (NMF)

a collection of water-attracting compounds within the outer skin cells, including amino acids, urea, lactate, and PCA, that draw and hold moisture in the surface layers. This built-in humectant system...

Natural Moisturizing Factor (NMF)

a collection of water-attracting compounds within the outer skin cells, including amino acids, urea, lactate, and PCA, that draw and hold moisture in the surface layers. This built-in humectant system...