Proactiv Solution 3-Step System is a 3-product kit containing Renewing Cleanser, Revitalizing Toner and Repairing Lotion. The system uses benzoyl peroxide, a proven topical disinfectant that kills acne-causing bacteria.… Both the cleanser and the lotion contain a 2.5% solution of benzoyl peroxide, which several experts prefer because it is less drying than higher concentrations but just as effective. The toner uses glycolic acid, an alpha hydroxy acid (AHA) that exfoliates the skin. While many users swear by Proactiv, we also read some reports that while it's effective at first, it loses its effectiveness over time for some users.
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