Ingredient guide
Acetyl hyaluronic acid
acetyl hyaluronic acid
In short
Acetyl hyaluronic acid is a modified form of hyaluronic acid that forms a longer‑lasting hydrating film on the skin. It helps skin stay moisturised for longer than standard HA. It is often blended with multiple HA weights for layered hydration.
Reviewed against published evidence · editorially independent · no brand pays to be featured
Works for
Hydration · Barrier
Best used
Anytime
What it is
Acetylated form of sodium hyaluronate in which acetyl groups replace some hydroxyl positions on the glucuronic acid residues; the modification reduces the molecule's solubility in water, enabling it to form a more persistent film on the skin surface rather than immediately binding atmospheric moisture; acts as a slow-release hydration depot that extends the effective humectant window; pairs well with high and low molecular weight sodium hyaluronate to deliver surface, mid, and deep-layer hydration; compatible across a broad formulation pH.
What the evidence says
ModerateHyaluronic acid (topical)applied to skin
Studied in relation to plumper, better-hydrated-looking skin. It draws and holds water at the surface.
Studied as 0.1% hyaluronic acid.
See the source
76 women, 0.1% HA, twice daily 60 days: significant hydration and elasticity gains vs placebo; low-MW HA reduced wrinkle depth.
hydration, elasticity, wrinkle depth · 0.1% hyaluronic acid
J Drugs Dermatol, 2011
Where it sits
A watery layer. After cleansing, before anything heavier, ideally on slightly damp skin.
- Cleanse
- Tone
- Acetyl hyaluronic acid
- Moisturise
- SPF
Also found as
Related
Where to find it
Options across the range, not a ranking. Run one through Lens and MIRU will tell you if it fits you.
Hada Labo Gokujyun Premium Lotion
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Common questions
What does acetyl hyaluronic acid do for skin?
It provides extended surface hydration by forming a more persistent moisture film, helping skin feel smoother and supple.
Who is acetyl hyaluronic acid for?
It works for most skin types, especially those wanting longer‑lasting hydration without heaviness.
How is acetyl hyaluronic acid used?
It appears in hydrating essences, serums, and lotions. It can be layered easily with other moisturising ingredients.
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Personal guidance, not medical advice.