Ingredient Beauty BenefitsBarrier lipid · An ingredient class — not a single line on an ingredient list
Ceramides: that they beat petrolatum is not established
In 39 children with atopic dermatitis randomised three ways, a ceramide barrier cream, another prescription cream and an over-the-counter petrolatum ointment did not differ, and the petrolatum was at least 47 times more cost-effective. Applying emollients to newborns to prevent eczema also failed in a Cochrane review.
Last checked Sep 16, 2026
- In pregnancy
- Not established
- Irritation
- Minimal
- Daytime use
- ✓ Fine
Not a measurement — reported irritation grouped into five steps. It varies between people.
Ceramides are a major lipid component of the stratum corneum, and skin with an impaired barrier does measurably have less of them.
The step from there to 'so applying them refills the supply' is where this ingredient's marketing stands. Human trials do not support that step. Asked to compare ceramide creams against something else, they keep answering 'no difference'.
This is also a class rather than a single ingredient. On a label it appears as ceramide NP, ceramide AP and so on.
Contents
What is established
The same ingredient at a different strength, in a different formula, is a different product. These are the conditions the studies used.
In children with atopic dermatitis, a ceramide cream did not beat petrolatum
Thirty-nine patients aged 2 to 17 with mild-to-moderate atopic dermatitis were randomised 1:1:1 to a glycyrrhetinic-acid barrier cream, a ceramide-dominant barrier cream, or an over-the-counter petrolatum product, applied three times daily for three weeks.
Severity and improvement were assessed at days 7 and 21. No statistically significant difference was found between the three groups on any measure, and the over-the-counter petrolatum was at least 47 times more cost-effective than either of the others.
The authors noted that 39 subjects is a small sample. A small difference could have been missed.
What the trial did not do is confirm that a ceramide cream outperforms an ordinary moisturiser, and 'not established' is the honest label for that result.
- Randomised controlled trial in people · 39 participants · 3 weeks · Compared with another active ingredient · Funding not declared · Endpoint scores from blinded assessors PMID 21533301
Moisturising newborns did not prevent eczema, and skin infections went up
A Cochrane systematic review pooling 33 randomised trials and 25,827 participants. It compared skin care — mostly emollients — during the first year of life in healthy term infants against no skin care or local standard care. Of the 17 trials reporting relevant outcomes, 13 tested emollients.
The authors' conclusion: skin care interventions in the first year are probably not effective for preventing eczema, and probably increase the risk of skin infection. Effects on food allergy are uncertain.
The review covers emollients generally, not ceramide products specifically. But the largest version of the claim — that reinforcing the barrier prevents eczema — was tested at scale and did not pass, which is worth knowing when choosing a ceramide product.
- Randomised controlled trial in people (33) · 25,827 participants · Compared with no treatment · Funding publicly funded · Endpoint clinical events (cancers, lesion counts) PMID 33545739
How to use it
- As a moisturiser it does its job. What the evidence above does not support is that it does it better than shelf petrolatum.
- On dry skin, applying while the skin is still damp after washing works for any moisturiser.
- If the price gap is large, there is currently no evidence justifying it.
Cautions
- Atopic dermatitis is a medical condition. Cosmetics are not for treating disease; if you have symptoms, see a clinician.
- Applying emollients to newborns to prevent eczema is not supported by the review above.
- On labels, look for the individual names — ceramide NP, AP, EOP. A phrase like 'ceramide complex' tells you nothing about how much is in there.
- We found no established data on use during pregnancy.
With a new ingredient, apply a small amount somewhere inconspicuous, such as the inner arm, for two days first. Stop if it reddens or stings.
Related skin concerns
What this article relies on
- PubMed — 미국 국립의학도서관 문헌 데이터베이스National Library of Medicine · Checked on 2026-09-16