Protect against blemishes and reduce wrinkles with SkinCeuticals Blemish + Age Defense Acne Serum. This oil-free serum is formulated with 2% salicylic acid, dioic acid, glycolic acid and citric acids to gently exfoliate, reduce excess oil production, and treat skin prone to acne breakouts. It also works to improve the appearance of fine lines, wrinkles, and uneven skin tone.