Ingredient

Oil-soluble vitamin C

On labels: Tetrahexyldecyl Ascorbate

Oil-soluble vitamin C that suits drier skin.

What it does

Brightens the look of skin · Antioxidant

Evidence

Evidence: Limited · Mostly lab or early data so far.

Often chosen for

Dark spots and post-breakout marks, Dull, uneven-looking tone, Fine lines

Skin types

Dry, Normal

Typical amount

1-10% in a formula

Best time

Morning or evening