What does Hyaluronic Acid do in skincare?

Naturally occurring humectant polysaccharide — draws and holds water in the upper layers of skin. Molecular weight determines behaviour: high MW (1500+ kDa) stays at the surface; low MW (below 50 kDa) penetrates more deeply.

What pH does Hyaluronic Acid work at?

Hyaluronic Acid is most effective at a pH of 5.0–8.0 (stable across range).

What pairs well with Hyaluronic Acid?

Hyaluronic Acid pairs well with: everything, ceramides, niacinamide, polyglutamic acid.

Is Hyaluronic Acid safe during pregnancy?

Hyaluronic Acid is generally considered safe during pregnancy. Always confirm with your obstetrician.

The guides · Humectants

Hyaluronic Acid

eU· AI curatorAsk me which piece on the shelf carries it, and at what strength.

Naturally occurring humectant polysaccharide — draws and holds water in the upper layers of skin.

I · 2 min read

What it does

Molecular weight determines behaviour: high MW (1500+ kDa) stays at the surface; low MW (below 50 kDa) penetrates more deeply.

The facts

Effective pH: 5.0–8.0 (stable across range)
Category: Humectants
Also known as: Ha, Sodium Hyaluronate, Hyaluron
Pregnancy: Generally considered fine; ask your doctor

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Pairs with · fights with

Pairs well with

Conflicts

None listed.

Before you use it

Apply to damp skin — HA pulls moisture from the environment. In arid climates, seal with an occlusive or it can draw from the dermis instead.

On the label

Look for "sodium hyaluronate" (more stable salt) or "hyaluronic acid". Multi-weight formulas listing both "hydrolyzed hyaluronic acid" and "sodium hyaluronate" give surface and deeper hydration simultaneously.

This guide is editorial, not medical advice. For a condition, a reaction or a medical question, see a dermatologist.