What does Pure Vitamin C do?

The gold-standard vitamin C for fading dark spots and adding antioxidant protection — but it oxidizes fast, so store it away from light.

How long before Pure Vitamin C shows results?

Most people see a fair result around 10 weeks of consistent use — judging earlier usually means judging too soon.

Pigmentation

Pure Vitamin C

INCI: Ascorbic Acid

Ascorbic acid — pure vitamin C — is the most-studied ingredient for fading dark spots and evening out tone, and it doubles as an antioxidant that helps the skin resist the free-radical damage that causes those spots in the first place. It's also the least stable form of vitamin C: it oxidizes on contact with light and air, which is why storage matters as much as application.

How to introduce it

Starting / week

Target / week

—

Ramp period

10w

Fair to judge by

Rules that don't bend

AM preferred — pairs with sunscreen for antioxidant protection.
Do not layer with AHA/BHA in the same session — the low pH of both can destabilize each other; alternate nights or use vitamin C in AM only.
Store away from light and heat; discard if it turns dark orange/brown.