Evidence reviews of skincare, cosmetic treatments, and hair-loss claims.
Evidence check Exosome serums are marketed as tiny cellular messengers that can repair, regenerate and rejuvenate skin. The biology is interesting. The clinical evidence is much less mature. WEH verdict UNCERTAIN Early studies suggest possible short-term improvements in wrinkles, pigmentation, hydration and elasticity. But the evidence is low to very low certainty, and much of…
WEH claim check Vitamin C serum is one of skincare’s most repeated promises: brighter skin, fewer wrinkles, more collagen, and antioxidant protection. The evidence is not empty, but it is much thinner than the marketing makes it sound. WEH verdict Plausible, with low-certainty evidence A stable, well-formulated topical vitamin C product may modestly improve uneven…
WhatEvidence.Health claim check Niacinamide for skin: helpful or overhyped? Niacinamide is a real skincare ingredient with useful human evidence. The hype starts when it is sold as a one-step cure for acne, melasma, rosacea, wrinkles, and “barrier repair.” WEH Verdict: Promising Most supported uses: barrier support, oiliness, uneven tone, and modest texture changes. Treating rosacea…
Minoxidil for hair loss: proven help, not a cure Minoxidil has real evidence for pattern hair loss. But “works for some people” is not the same as a cure, a guarantee, or proof for every kind of hair loss. WEH Verdict: Supported with important limits Strong for topical minoxidil in pattern hair loss; cautious for…