Active ingredient

Vitamin C

INCIAscorbic Acid

Last reviewed by BIOSAR Scientific Team, PharmD, Cosmetic Chemistry, Pharmacy practice on April 28, 2026.

What it is

Vitamin C, in skincare most often L-ascorbic acid, is a water-soluble antioxidant used to brighten tone, neutralise reactive oxygen species, and support collagen synthesis. It donates electrons to free radicals, regenerates oxidised vitamin E, and serves as a cofactor for prolyl hydroxylase in collagen formation. pH stability matters: store in opaque, sealed packaging.

Pregnancy and breastfeeding

Safe

Considered safe during pregnancy and breastfeeding.

Vitamin C is an endogenous nutrient and topical use is well-tolerated. Mother to Baby and Trivedi et al. (2017) flag no concern during pregnancy or lactation.

Mechanism in detail

What Vitamin C does

Antioxidant that helps neutralize free radicals and supports a more radiant complexion. Contributes to the appearance of even tone over time.

Evidence

What the research says

6 monthsPhotoaged skin improved against the placebo sideA 6-month double-blind study in women with sun-aged skin on the low neck and arms: the side treated daily with a vitamin C cream improved on the overall photoaging score, with denser skin relief and shallower furrows than the placebo side.Read the study →Exp Dermatol 2003 (Humbert)

Where it helps