Ingredient

PHA

On labels: Gluconolactone

Very gentle exfoliant that also hydrates, good for first-time exfoliators.

What it does

Exfoliates · Hydrates · Antioxidant

Evidence

Evidence: Moderate · Some good studies; results vary from person to person.

Often chosen for

Rough texture, Dull, uneven-looking tone, Skin prone to redness

Skin types

Dry, Oily, Combination, Normal, Sensitive

Typical amount

2-10% in a formula

Best time

Morning or evening