Ceramides are fats your skin makes itself. Together with cholesterol and fatty acids, they fill the gaps between surface cells and keep water in. Creams add them for skin that feels dry, tight, flaky or easily irritated. Research suggests they work best mixed with the skin's other barrier fats, not on their own.
- Helps with
- dry skin, tight skin after washing, flaking, easily irritated skin
- Evidence
- Moderate. Strong lab and barrier-repair research; human trials are smaller and usually test ceramides inside complete lipid mixtures.
- Typical strength
- Studies test mixtures rather than one percentage, such as equal parts ceramides, cholesterol and fatty acids, or 3:1:1 with one fat leading
- Works well with
- cholesterol, fatty acids, glycerin
What do ceramides do for skin?
Picture the top layer of skin as a brick wall. The bricks are flattened dead cells; the mortar between them is a mix of fats. Ceramides are the main fat in that mortar. When the mortar is thin, water escapes, and skin feels tight after washing, looks flaky on the cheeks or shins, and stings when you put products on.
A review of ceramide research describes the mortar as roughly equal parts free fatty acids, cholesterol and ceramides, and calls ceramides essential to keeping water in. Ceramide creams aim to top up that mortar from outside.
Do ceramide creams repair the skin barrier?
They help most when they bring the whole recipe. In barrier-repair experiments, putting just one or two of the three fats on damaged skin actually slowed recovery; the authors found that “only equimolar mixtures allow normal recovery”, meaning equal parts of all three. Raising one of them up to 3 times the others sped repair further, first in mouse skin and in early tests on human skin.
The same idea held in older skin. In people aged around 80, a mix led by cholesterol in a 3:1:1:1 ratio sped barrier recovery 6 hours after the skin was stripped with tape. In a 2025 study, adults with a history of eczema used a cream with skin-identical fats and glycerin on one arm and leg and a cream with glycerin alone on the other, twice a day for 28 days; the fat-containing cream shifted the skin’s own ceramide profile and strengthened its barrier. For the longer answer, see do ceramides repair the skin barrier?
How long until you notice a difference?
Barrier changes in the studies above were measured over hours after tape stripping and over 28 days in the 2025 trial.
How do you use ceramides?
As the last step at night and before sunscreen in the morning, in a moisturizer. They fit naturally right after washing; see why skin feels so dry after a shower. Look for labels that list ceramides together with cholesterol and fatty acids.
Who should be careful with ceramides?
The studies summarized here focused on barrier repair rather than side effects. Ceramides are part of the skin’s own barrier, but the cream around them matters: a heavy texture can feel greasy on oily skin, and any new formula is worth a patch test if your skin reacts easily.
- Coderch L, et al. Ceramides and skin function. Am J Clin Dermatol. 2003;4(2):107-29.
- Man MQ, et al. Optimization of physiological lipid mixtures for barrier repair. J Invest Dermatol. 1996;106(5):1096-101.
- Zettersten EM, et al. Optimal ratios of topical stratum corneum lipids improve barrier recovery in chronologically aged skin. J Am Acad Dermatol. 1997;37(3 Pt 1):403-8.
- Andrew PV, et al. Topical supplementation with physiological lipids rebalances the stratum corneum ceramide profile and strengthens skin barrier function in adults predisposed to atopic dermatitis. Br J Dermatol. 2025;193(4):729-740.
- Meckfessel MH, Brandt S. The structure, function, and importance of ceramides in skin and their use as therapeutic agents in skin-care products. J Am Acad Dermatol. 2014;71(1):177-84.
Editorial content, not medical advice.