Question: what is the difference between lactic acid and salicylic acid?
Answer: Because salicylic acid is oil-soluble, it can penetrate into the pore lining to break up clogs at their source, while also exfoliating dead, dull cells on skin's surface. ... In a pH-correct formula, lactic acid exfoliates cells on the surface of skin by breaking down the material that holds skin cells together.