All acids exfoliate the skin to dislodge dead and strongly pigmented cells, they encourage cell turn around to renew the skin. Each acid offers a special benefit, Lactic Acid improves hydration, Salicylic Acid is antibacterial and prevents clogged pores, Azelaic Acid controls sebum. With this Lixirskin Night Switch BHA/AHA 10% your skin is quickly even-toned, radiant, plumper, softer, and smoother. Gradually, fine lines, pore size, blackheads and spots are reduced.