PAULA'S CHOICE Skin Perfecting BHA Liquid Exfoliant is a non-abrasive, leave-on exfoliator that effectively reduces dead skin buildup, unclogs pores, and diminishes redness, leading to a smoother and more even skin complexion with the help of salicylic acid and niacinamide. It is designed to improve skin texture and clarity, targeting concerns such as excess sebum, enlarged pores, and blackheads.