When dead skin cells accumulate on the surface of the skin, they need to be removed or dissolved. That process is called exfoliation (or refinement). Exfoliation creates a smoother, more even skin surface and helps the skin absorb moisturizers, serums and masques more easily. It may also activate the production of collagen fibers.
Salicylic acid is a beta hydroxy acid (BHA) obtained from the bark of the white willow and wintergreen leaves. It is known for its anti-bacterial, anti-inflammatory, and exfoliating properties. It’s also used to make aspirin.