Can you use Kojic acid with Vitamin C (L-ascorbic acid)?
Use with cautionEvidence · Commonly advised
Both are acidic, tone-directed and capable of stinging, and using them in the same step is a common cause of irritation. Splitting them across AM and PM is the usual advice, particularly on sensitive skin.
Commonly advised: Frequently recommended by formulators; direct evidence can be limited.
Kojic acid
INCI · Kojic Acid
A fungal-derived ingredient used for the look of uneven tone; can be more irritating than its gentler cousins.
Read the reference →Vitamin C (L-ascorbic acid)
INCI · Ascorbic Acid
An antioxidant active, typically used in the morning for a brighter-looking, more even complexion.
All pairings →Cosmetic layering guidance for the look and feel of your routine — not medical advice. Patch-test new combinations.