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Ingredient guide
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.
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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.
Also found as
Related
Where to find it
Hada Labo Gokujyun Premium Lotion
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Common questions
It provides extended surface hydration by forming a more persistent moisture film, helping skin feel smoother and supple.
It works for most skin types, especially those wanting longer‑lasting hydration without heaviness.
It appears in hydrating essences, serums, and lotions. It can be layered easily with other moisturising ingredients.
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Personal guidance only · For clinical concerns, see a dermatologist.