Limited evidenceJoints & skin

Ceramides (Phytoceramides)

Small manufacturer-run trials report modest gains in skin hydration after 6-12 weeks of oral plant-derived ceramides, but the studies are tiny, short and use soft endpoints. Nothing here supports the wrinkle-reversal marketing that surrounds these products.

What the science says

Skin hydration and dryness Limited evidence
A 12-week double-blind RCT using 0.8 mg/day of dihydroceramide from acetic acid bacteria significantly improved stratum corneum hydration in adults with dry skin. A 6-week trial in 51 volunteers using 100 mg/day of konjac extract (5 mg glycosylceramides) reported less dryness, redness and itching. Both were designed and funded by the ingredient manufacturers.
Wrinkles and skin ageing Limited evidence
Anti-wrinkle claims rest on self-assessment questionnaires and small dermatological scoring exercises rather than instrumented, blinded measures in adequately powered trials. No convincing evidence supports oral ceramides for wrinkle depth or firmness.
Whether ingested ceramides reach the skin Limited evidence
Dietary ceramides are largely digested to sphingoid bases and fatty acids; the proposed mechanism is signalling that upregulates the skin's own barrier lipid synthesis rather than direct incorporation into the stratum corneum. This has not been demonstrated in humans.

Dosage & safety

Studied doseTrials used very small amounts of actual ceramide: roughly 0.6-5 mg/day of glucosylceramide or dihydroceramide equivalents from wheat, rice, konjac or beet sources, for 6-12 weeks. Note that a capsule advertised as '350 mg phytoceramides' usually refers to total extract weight and may contain only a few milligrams of ceramide — check the standardised ceramide content on the label.

SafetyNo serious adverse events were reported in the short trials available, and tolerability appears good. Wheat-derived phytoceramides contain gluten traces and should be avoided in coeliac disease or wheat allergy. Long-term safety beyond 12 weeks is unstudied, as is use in pregnancy. Regulatory note: the US Federal Trade Commission has taken enforcement action against phytoceramide sellers for unsupported anti-ageing claims, so treat the marketing around this ingredient with scepticism.

Scientific references

Potential benefits of oral administration of AMORPHOPHALLUS KONJAC glycosylceramides on skin health - a randomized clinical study
Heggar Venkataramana S, Puttaswamy N, Kodimule S — BMC Complementary Medicine and Therapies, 2020
Safety and Efficacy of Oral Intake of Ceramide-Containing Acetic Acid Bacteria for Improving the Stratum Corneum Hydration: A Randomized, Double-Blind, Placebo-Controlled Study over 12 Weeks
Tsuchiya Y, Ban M, Kishi M, Ono T, Masaki H — Journal of Oleo Science, 2020

Where to buy

Sports Research, Phytoceramides Mini-Gels, 350 mg, 30 Softgels

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