Ceramide NP

What it is

Ceramides are the most abundant fat in the outermost layer of skin, where they stack with cholesterol and free fatty acids into the lamellar sheets that hold water in and keep irritants out. Ceramide NP, formerly called ceramide 3, is one specific type made synthetically or by fermentation so that it matches a ceramide the skin already produces. It is added to moisturisers and masks to top up a lipid supply that is measurably depleted in dry, eczema-prone and older skin.

What it does well

• Measurably strengthens a weakened skin barrier

  In a 58-person double-blind study in adults with a history of eczema, an emulsion containing physiological lipids including ceramide NP significantly improved barrier integrity and reduced sensitivity to a detergent challenge, while a glycerine-only emollient on the other arm reduced dryness but did nothing for barrier function.

  Strong evidence

• Raises the skin's own ceramide levels

  In that same study, lipidomic analysis of tape-stripped skin found ceramide NP with an 18-carbon sphingoid base rose 24% after four weeks of treatment, and the increase tracked with improved barrier integrity. Applied ceramides are not just sitting on top.

  Moderate evidence

• Works better alongside cholesterol and fatty acids than alone

  Classic barrier research showed that applying one or two of the three physiological lipids alone actually delays barrier recovery; only complete mixtures allow normal repair, and making one of the three dominant in roughly a 3:1:1 ratio speeds it up. A product listing ceramides plus cholesterol plus a fatty acid is following that evidence.

  Strong evidence

Worth knowing

• Often present at token amounts

  Ceramides are among the more expensive cosmetic raw materials, and a product may legally advertise them while including a fraction of a per cent. Position on the ingredient list, particularly if it falls after the preservative, is a rough guide to how much is really there.

  Matters most toAnyone paying a premium specifically for ceramide content.

• Prevention claims are not yet proven

  A randomised trial of a ceramide and amino acid emollient for preventing eczema in high-risk infants showed a numerical trend in favour of treatment (13.2% versus 25.0% at one year) but under-enrolled and did not reach statistical significance. Barrier repair is well supported; disease prevention is not.

  Matters most toParents choosing an emollient specifically to prevent eczema.

Where the EU stands

Sources (3)

Every link goes to the original: a journal, a PubMed record or an EU document.

1. [1]
   Topical supplementation with physiological lipids rebalances the stratum corneum ceramide profile and strengthens skin barrier function in adults predisposed to atopic dermatitis

   British Journal of Dermatology · 2025 · doi:10.1093/bjd/ljaf200

   A lipid emulsion containing ceramide NP improved barrier integrity and reduced irritant sensitivity over 28 days, while a glycerine emollient without physiological lipids improved dryness only.

2. [2]
   Optimization of physiological lipid mixtures for barrier repair

   Journal of Investigative Dermatology · 1996 · doi:10.1111/1523-1747.ep12340135

   Ceramides, cholesterol and free fatty acids must be applied together for normal barrier recovery, and increasing any one of the three up to threefold accelerates repair further.

3. [3]
   A randomized controlled trial of an emollient with ceramide and filaggrin-associated amino acids for the primary prevention of atopic dermatitis in high-risk infants

   Journal of the European Academy of Dermatology and Venereology · 2019 · doi:10.1111/jdv.15786

   Daily use of a ceramide emollient produced a favourable but statistically non-significant trend in eczema incidence, in a trial that recruited fewer than half its target sample.