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Limited evidenceSkin & hair

Hyaluronic acid

Also called: Sodium hyaluronate, HA

A moisture-holding molecule in skin and joints. Small studies suggest oral HA may help skin hydration.

Typical amount
120–240 mg a day
Best time
Morning
Food
With or without food
Typical course
12 weeks, then review
Is it right for me?

Where to buy

3 products
Also inside 3 other products (combinations and multivitamins)

What is hyaluronic acid?

Hyaluronic acid holds water in skin and joint fluid. Oral supplements, usually 120–240 mg a day, have small studies showing better skin moisture and fewer fine lines. It's usually found inside skin blends with collagen or glutathione.

Forms. Capsules, tablets and skin blends.

What it may help with

Evidence grade

Strong: several good human trials. Moderate: some trials, mixed results. Limited: small or early studies. Traditional: long use, little trial evidence.

Safety and interactions

Side effects
Generally well tolerated.
Who should be careful
Usually found inside skin blends; check other ingredients
Stop and call a doctor if
Rash

Food sources

Bone broth contains small amounts.

Common questions

Is oral HA as good as a serum?

They work differently; a serum hydrates the surface, oral HA may help from within.

When should I take it?

Any time; morning is common.

How long until it works?

Studies run 8–12 weeks.

For information only, not medical advice. Prices and links are checked by hand and can change; we may earn a small commission on some links. This plan is based on your answers and is not a medical diagnosis. It does not replace advice from your doctor. If you take medicines or have a health condition, check with your doctor before starting any supplement.