What Works Skin — Independent · Evidence-First · Ad-FreeIssue 014 · 20 April 2026 · Next: 04 Maywhatworksskin.com
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Supplement · Trend Watch · Oral ceramides

P. 21 · BRIEF

Ceramide capsules.

Modest hydration data. Topicals outperform per rupee.

Wheat- or rice-derived ceramide capsules with small but reproducible TEWL-reduction endpoints. The mechanism is plausible, the trial data is honest, and the cost-effectiveness comparison against a CeraVe tub is unforgiving. A defensible adjunct; never a primary.

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— § 02

What the literature shows.

Skin hydration (corneometry)
Multiple RCTs, 30 mg/d × 12 wk

Modest, replicated improvement in stratum corneum hydration. The trial data is honest.

60%
TEWL reduction
Small trials

Small but consistent shift. Topical ceramide moisturisers produce larger endpoints at a fraction of the cost.

55%
Atopic dermatitis severity
Pilot trials

Promising signal; trials are too small for confident recommendation. Reasonable trial in mild atopy.

40%
'Anti-aging' / wrinkle work
—

Not the indication. Marketing extrapolation that the literature does not support.

10%
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— § 03

Forms and bioavailability.

Wheat-derived ceramide 30 mg

Absorption · Good

Most-studied form (Ceramosides). Standard 12-week protocol.

Rice-derived ceramide 30 mg

Absorption · Good

Gluten-free alternative. Equivalent endpoints in head-to-head trials.

Phytoceramide blend 50 mg

Absorption · Good

Higher-dose marketing fork. Diminishing returns above 30 mg/d.

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Bottom line

A defensible adjunct, never a foundation. Spend the money on a topical ceramide cream first; consider this only if topical optimisation has plateaued.

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— § 04

Frequently asked.

Why not just use a topical?

You almost certainly should. A tub of CeraVe Moisturising Cream applied twice daily delivers the ceramides where they actually matter — at the stratum corneum — at a fraction of the supplement's price. Oral ceramides may have a marginal additive role in stubborn eczema or generalised dryness, but the topical foundation should always come first.

How long until effect?

12 weeks at 30 mg/d. Hydration shifts can be measured by week 6; the visible textural endpoints lag behind. Photograph at week 0 and week 12 for honest comparison.

Is this safer than topicals?

There is no safety advantage — both are safe. The supplement category does avoid the formulation politics (ingredient irritation, fragrance) that some sensitive-skin patients face with topicals, which is a real if narrow use-case.

Can I combine with topical ceramides?

Yes, with no interaction concern. The two work via different mechanisms: oral ceramides increase the substrate pool available for skin synthesis; topical ceramides directly fill the stratum corneum. Stack if you want; the marginal benefit is modest.