An oxidising active often used in blemish-prone routines.
Benzoyl peroxide can oxidise and deactivate many retinoids (adapalene is a noted exception). Keep them in separate routines rather than the same layer.
Benzoyl peroxide is a strong oxidiser, so it's commonly kept away from copper peptides in the same layer. Use them at different times of day if you use both.
Benzoyl peroxide can oxidise L-ascorbic acid, which may reduce its cosmetic benefit if layered together. Many keep them in separate routines.
Two strong actives together can be drying or irritating for some; introduce slowly.
Both can be drying; many use them on alternate days rather than the same layer.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
Often paired; niacinamide can help the routine feel more comfortable.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
No specific interaction noted — generally fine to layer in a cosmetic routine. Patch-test new combinations.
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