Alpha-hydroxy acids include glycolic, lactic, tartaric, malic, and citric acids ... It also helps with acne. Many skin care products contain salicylic acid. Some are available over-the-counter ...

Lactic acid is the best exfoliating ingredient for dry, sensitive skin. Salicyclic acid is the best exfoliating ingredient for oily, acne-prone skin. Chemical exfoliants like alpha- and beta ...