Barrier Lipids
Barrier Lipids — the fatty molecules, mainly ceramides, cholesterol, and free fatty acids, that fill the spaces between cells in the skin's outermost layer. Together they form a water-resistant matrix that holds moisture in and keeps irritants and allergens out.
Key points
- The three core barrier lipids are ceramides, cholesterol, and free fatty acids.
- They are often described in a roughly balanced ratio thought to support optimal barrier function.
- These lipids reduce water loss through the skin and defend against external irritants.
- Depletion of barrier lipids is linked to dryness, sensitivity, and conditions with a compromised barrier.
Frequently asked
What are the main barrier lipids in skin?
Ceramides, cholesterol, and free fatty acids are the three key lipids that form the skin's protective moisture barrier.
Why do barrier lipids matter for dry skin?
They seal moisture into the skin and block irritants, so when they are depleted the skin can become dry, sensitive, and more reactive.
Related topics
This is a foundational entry in the SYNC Skin Encyclopedia and is expanded over time. Educational information only — not medical advice.
