## Description - Stands for *alpha hydroxy acid* and *beta hydroxy acid* - Chemical exfoliants that help remove dead skin cells - Improves - Fine lines and wrinkles - Acne - Color and texture of sun-damaged skin - Subclasses - Glycolic acid - Lactic acid - Citric acid - Hydroxycaprylic acid - Hydroxycapric acid - Salicylic acid - Beta hydroxybutanoic acid - Tropic acid - Trethocanic acid