Salicylic Acid is a Beta-Hydroxy Acid, derived from Willow Bark, and belongs to a group of ingredients called salicylates. It’s unique structure means it’s more oil-soluble therefore it is able to penetrate the pore of the skin. For instance, Alpha-Hydroxy Acids like glycolic acid and lactic acid are water-soluble, so whilst they work well to loosen dead skin cells, BHA’s like salicylic acid penetrate lipid layers more easily, working deeper to unclog pores.
Because of this, Salicylic Acid works particularly well on acneic or breakout prone complexions. Once it has penetrated the skin, the acid part of the molecule dissolves pore-clogging skin debris and helps spots fade quicker. Working to remove, loosen and dissolve dead skin cells, Salicylic Acid also promotes exfoliation.