Beta hydroxy acid. Encourages desquamation by “dissolving” intracellular “cement” with no inflammatory effects, also deep cleans pores and removes debris from hair follicles. Occurs naturally in wintergreen leaves, sweet birch and selected plants. Medically used as an exfoliant and debriding agent. Cosmetically used in some chemical peels and to reduce oiliness, acne and the appearance of fine lines.