Peter Thomas Roth AHA/BHA Acne Clearing Gel. Oil-free maximum strength acne medication with glycolic acid 10% and salicylic acid 2%. Oil-free, fragrance-free deep pore clearing gel for normal, oily, combination or problem skin. Contains potent alpha hydroxy acid and maximum beta hydroxy acid (salicylic acid 2%) to clear up acne blemishes and help reduce the appearance of fine lines, wrinkles and other signs of aging. Penetrates pores to eliminate, clear up and prevent the development of whiteheads, blackheads and blemishes while allowing skin to heal.