This serum has a 2% concentration of Salicylic acid and is water-based. It encourages the natural exfoliation process of the skin's surface, which helps to remove dead skin cells. Additionally, it has lipophilic properties, meaning that it can dissolve oil and penetrate deep into pores to control acne blemishes.The formula takes a multifunctional approach to help clear pores, reduce the appearance of visible redness, and treat comedones, ultimately resulting in clearer and smoother-looking skin. This serum is suitable for teenagers with mild to moderate acne.