Ingredients

Linoleic Acid

Written by Reviewed by the SYNC editorial team Published Last reviewed Editorial standards

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.

Key points

  • Linoleic acid is a key building block of ceramide 1, a barrier lipid that helps hold skin cells together and limit water loss.
  • Skin low in linoleic acid tends to produce thicker, more solid sebum, which some research links to clogged pores and blackheads.
  • It is considered a lightweight, fast-absorbing fatty acid, so oils high in linoleic acid often feel less greasy on the skin.
  • Because it is essential, the body relies on external sources like plant oils and diet to maintain adequate levels.

Frequently asked

Is linoleic acid good for acne-prone skin?

Oils high in linoleic acid are often described as lower-comedogenic and are popular in acne-prone routines, though individual results vary and it is not a treatment for acne.

What is the difference between linoleic and linolenic acid?

Linoleic acid is an omega-6 fatty acid, while alpha-linolenic acid is an omega-3; both are essential, but they differ in structure and the skin functions they primarily support.

Related topics

This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.

Encyclopedia

Further reading

This entry was written and checked against the sources below. They are published by clinical and scientific bodies, they are listed most readable first, and each one opens in a new tab. They are background for the whole entry rather than footnotes to individual sentences.

  1. Linoleic Acid PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  2. Skin Lipids and Their Influence on Skin Microbiome and Skin Care PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  3. The Role of Linoleic Acid in Skin and Hair Health: A Review PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov
  4. Essential function of linoleic acid esterified in acylglucosylceramide and acylceramide in maintaining the epidermal water permeability barrier. Evidence from… PubMed Peer-reviewed (abstract) pubmed.ncbi.nlm.nih.gov
  5. Skin barrier function DermNet NZ Clinical guidance dermnetnz.org
  6. Lipids and the Permeability and Antimicrobial Barriers of the Skin PubMed Central Peer-reviewed, open access pmc.ncbi.nlm.nih.gov

SYNC does not publish medical advice. Nothing here replaces a consultation with a doctor or a pharmacist about your own skin.