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Ingredient glossary
Ceramides: What It Is and What It Does
Ceramides are lipids (fatty molecules) that occur naturally in skin and form a major part of the barrier that holds moisture in and keeps irritants out. In skincare, added ceramides are used to help support and replenish this barrier, particularly in moisturisers aimed at dry, sensitive or compromised skin.
What it does
Ceramides sit between skin cells in the outermost layer, acting like mortar between bricks to hold the skin barrier together. This structure is what limits water loss and keeps external irritants from penetrating easily. When a formula includes ceramides — often alongside cholesterol and fatty acids, mirroring skin's own natural ratio — it aims to help replenish a barrier that has been compromised by things like over-cleansing, harsh actives, weather or eczema-prone skin, supporting a more comfortable, less reactive-feeling skin surface over time.
Who it suits
Ceramide-containing products are commonly chosen by people with dry, sensitive or barrier-compromised skin, including skin that stings easily, flakes despite regular moisturising, or has been irritated by strong actives such as retinol or acids. They are generally considered gentle and suitable for regular use across most skin types, including oily skin during periods of irritation.
Cautions
Ceramides are among the better-tolerated skincare ingredients and irritation is uncommon. They are not a substitute for medical treatment of diagnosed skin conditions such as eczema or psoriasis, and anyone with a persistent or worsening skin condition should see a GP, pharmacist or dermatologist rather than relying on cosmetic moisturisers alone.
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Frequently asked questions
- Can ceramides help with a damaged skin barrier?
- Ceramide-containing moisturisers are commonly used to help support a compromised barrier — the sensation of stinging, tightness or flaking that follows over-exfoliation or harsh products. They work best alongside cutting back on aggressive actives and cleansers while skin recovers.
- Are ceramides natural or synthetic?
- Both exist. Skincare typically uses lab-synthesised ceramides that are structurally identical, or very similar, to the ones the skin makes naturally, since this gives consistent quality and avoids relying on animal or plant extraction at scale.
- Can I use ceramides with retinol or acids?
- Yes, and it is a common pairing. Because ceramides support the skin barrier rather than exfoliate or increase cell turnover, they are frequently used alongside more potent actives specifically to offset the dryness those actives can cause.
This is general information about a cosmetic ingredient, not medical advice. It does not describe any specific product, and does not diagnose, treat or cure any condition. If you have a persistent skin or scalp concern, speak to a pharmacist, GP or dermatologist. See our editorial policy for how we handle claims.