Salicylic acid is considered a benchmark in cosmetics in the category of "exfoliants". Psoriasis, blackheads, dull complexion, brown spots, pimples, keratosis pilaris... it is used in a wide variety of skin disorders related to desquamation and hyperkeratosis of the stratum corneum. However, with this broad usage and high clinical efficacy, how does salicylic acid exert its "peeling effect" on the skin?