Ingredient guide
Hyaluronic acid
hyaluronic acid
In short
Hyaluronic acid (also known as sodium hyaluronate) is a skincare humectant generally associated with hydration and barrier support. It is backed by a strong body of published research. It is often chosen for dry, sensitive and combination skin. MIRU describes it by what is visible on skin — never as a treatment or cure.
Reviewed against published evidence · editorially independent · no brand pays for placement
Works for
Hydration · Barrier
Skin type
Dry · Sensitive · Combination
Best used
Anytime
What it is
Holds water in the upper layers. Best applied to damp skin, then sealed.
When to use it
Either — morning and evening both work.
Best applied to slightly damp skin, then sealed with moisturiser.
On the label
Usually 0.1–2% on labels
Small numbers are normal — it is used at low percentages by design.
Pairs well with
Where it sits
A watery layer — after cleansing, before anything heavier, ideally on slightly damp skin.
- Cleanse
- Tone
- Hyaluronic acid
- Moisturise
- SPF
Also found as
Related
Where to find it
La Roche-Posay Hyalu B5 Serum
Hyaluronic acid + vitamin B5. Gentle daily hydrator for thin-skinned winter weeks.
Fit comes first: the Lens checks each product against your skin before any retailer link. We may earn a commission, at no cost to you — picks are editorial, never paid.
Common questions
What does Hyaluronic acid do for skin?
Hyaluronic acid is associated in published research with hydration and barrier support. Holds water in the upper layers. Best applied to damp skin, then sealed. MIRU frames ingredients by what is visible, not by medical claims.
When should I use Hyaluronic acid?
Hyaluronic acid is typically used morning or evening. Introduce any new active on its own first and add one product at a time so you can see how your skin responds.
Is Hyaluronic acid suitable for my skin type?
Hyaluronic acid is often chosen for dry, sensitive and combination skin. It is generally considered well tolerated — if your skin is reactive, patch-test first and watch for any irritation.
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Personal guidance only · For clinical concerns, see a dermatologist.