Conflict Checker

Select two active ingredients to evaluate their chemical compatibility and physiological impact when layered.

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The interactive conflict matrix requires JavaScript. Alternatively, refer to our manual cross-reference chart:

Retinoids + AHAs/BHAs: High risk of barrier impairment. Separate into AM/PM routines or alternate nights.
L-Ascorbic Acid + Niacinamide: Potential temporary flushing due to niacin formation at low pH. Safe, but best spaced 15 minutes apart.
Benzoyl Peroxide + Retinoids: BP oxidizes tretinoin/retinol, rendering them inactive. (Except Adapalene, which is stable).

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