Paula's Choice 2% BHA Liquid Exfoliant is a best-selling, gentle, leave-on chemical exfoliant with 2% salicylic Acid (BHA) that unclogs pores, reduces black heads/ breakouts, smooths wrinkles, brightens skin, and evens tone by working inside pores to shed dead skin cells and control oil, suitable for all skin types for clearer, radiant, youthful-looking skin.