Glycolic Acid works as a gentle exfoliant that helps dissolve the top layer of dead skin cells. Removing the dead, dry skin cells makes way for new, younger skin cells and results in a more even skin tone, smoother surface and a healthier appearance. Salicylic acid is fat soluble, which gives it the ability to work its way to the bottom of clogged hair follicles to help dissolve the hardened excess build up of keratin.