Glycolic Acid - is a great acne ingredient. It will help increase the efficacy of other skin care ingredients and enhance exfoliation, much like salicylic acid.
Salicylic Acid -helps kill acne-causing bacteria and soothe inflammation. It is most effective when combined with glycolic acid.
Benzoyl Peroxide - has been shown to help acneic and oily skin: anti-bacterial, anti fungal, anti-inflammatory. Benzoyl Peroxide essentially exfoliates the skin, unblocks pores, and dries up excess oil. It can also help reduce redness.