Kojic Acid
Kojic acid fades dark spots by interrupting melanin production at the source. It's a reliable brightening ingredient, but it's also one of the few actives here with a hard conflict: never in the same routine as vitamin C, which destabilizes it.
How to introduce it
7x
Starting / week
7x
Target / week
—
Ramp period
12w
Fair to judge by
Rules that don't bend
- Sunscreen is mandatory daily — pigmentation actives are undone by unprotected sun exposure.
- Kojic Acid specifically: do not combine with Vitamin C (Ascorbic Acid) in the same session.
Don't combine with
Same-night use can irritate skin or cancel out the active — alternate nights instead of layering them together.