Ceramides for skin
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Ceramides are barrier lipids: with cholesterol and free fatty acids in roughly equal molar parts, they form the mortar between the corneocyte bricks of the stratum corneum. That ratio matters more than any single component, and applying one alone can sometimes disturb the balance rather than restore it. Ceramides act at low concentrations, but they do not stimulate your own ceramide production.
What is the skin barrier made of?
The stratum corneum is often described as bricks and mortar: corneocytes are the bricks, and the mortar is a lipid matrix made of approximately equal molar parts ceramides, cholesterol and free fatty acids. That ratio is the important part. Applying one component alone can in some circumstances disturb the balance rather than restore it, which is why the triad concept exists.
Which barrier lipids does the range use?
Ceramide NP (formerly ceramide 3) is one of the most-studied ceramide subtypes and appears in Vegalab's Hydrating NanoSerum, delivered in liposomes, and in three Youlief products.
Cholesterol appears in the Youlief Setup Cream and Cica Retinal Ampoule. It is the component most often omitted from ceramide products, so its presence is a positive sign of formulation intent.
Phytosphingosine, in the Youlief WP Sun product, is a sphingoid base - a ceramide precursor - with additional antimicrobial activity.
Hydrogenated phosphatidylcholine and lecithin in the Cica Retinal Ampoule are phospholipids rather than barrier ceramides; they are there as delivery materials.
How much ceramide do products need?
Ceramide NP appears at up to 0.0014%, or 14 ppm, and cholesterol at 9 ppm. Those are low. Ceramides do act at low concentrations, and barrier lipids are not dose-dependent in the way an exfoliant is, so these levels are not meaningless - but they are at the low end, and a product built primarily around barrier repair would generally use more. The presence of the triad is the right idea; the levels are modest.
What does ceramides and the barrier lipid triad not do?
They do not stimulate your own ceramide production - for that, niacinamide has better evidence. They are not anti-aging actives in the collagen sense. And a ceramide product cannot compensate for a barrier being actively stripped by over-cleansing or over-exfoliation.
Key takeaways
- The stratum corneum lipid matrix is roughly equal molar parts ceramides, cholesterol and free fatty acids.
- Ceramide NP, formerly ceramide 3, is one of the most-studied ceramide subtypes.
- Cholesterol is the component most often left out of ceramide products.
- Ceramides act at low concentrations, but a barrier-focused product would generally use more than trace levels.
- No ceramide product can make up for a barrier being stripped by over-cleansing or over-exfoliation.
References
The studies below describe the ingredient itself. Finished-product results appear in each product's evidence dossier.
- The important role of stratum corneum lipids for the cutaneous barrier function
- Decreased level of ceramides in stratum corneum of atopic dermatitis: an etiologic factor in atopic dry skin?
- Optimization of Physiological Lipid Mixtures for Barrier Repair
- Ceramide-dominant barrier repair lipids alleviate childhood atopic dermatitis: changes in barrier function provide a sensitive indicator of disease activity
- The efficacy of moisturisers containing ceramide compared with other moisturisers in the management of atopic dermatitis
- Nicotinamide: A Multifaceted Molecule in Skin Health and Beyond, Medicina 61(2):254, 2025 — Review · includes high-dose tolerance
Frequently asked questions
What do ceramides do for skin?
Ceramides are one of the three lipids, with cholesterol and free fatty acids, that make up the mortar of the stratum corneum. Together, in roughly equal molar proportion, they form the barrier that keeps skin intact.
Why does the ceramide ratio matter?
The barrier lipid matrix is made of approximately equal molar parts ceramides, cholesterol and free fatty acids. Applying one component alone can in some circumstances disturb that balance rather than restore it, which is why the triad concept exists.
Do ceramides boost your own ceramide production?
No. Applied ceramides do not stimulate your own ceramide production. For that, niacinamide has better evidence.
What is ceramide NP?
Ceramide NP, formerly called ceramide 3, is one of the most-studied ceramide subtypes. Phytosphingosine, by contrast, is a sphingoid base that acts as a ceramide precursor.
More in ingredients
Products containing ceramides and the barrier lipid triad
Listed because this ingredient appears in each product's declared composition. This is a commercial link from a reference page; it is not a recommendation, and approved uses and availability vary by market.