~ MIXED
Skincare
Topical Hyaluronic Acid
A good humectant that plumps the stratum corneum for hours — cosmetic hydration, not anti-aging.
Also called: ha serum · hyaluronic acid · hydrating serum
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Verdict — mixed
Real in part — the claim outruns what it actually does.
B
Evidence grade B
At least one good randomised trial, or consistent findings across controlled studies.
Mechanism
High-molecular-weight HA binds water at the skin surface; it does not penetrate to the dermis where injectable HA acts.
Citations
- Efficacy of topically applied hyaluronic acid of different molecular weightsJournal of Drugs in Dermatology · 2011
The full read
Expect a smoother, temporarily plumper skin surface, especially in dry climates (apply on damp skin, seal with moisturizer). Marketing conflates it with dermal fillers — same molecule, completely different depth and duration. Useful supporting act; not a headliner.
