Lactic Acid is primarily used as a chemical exfoliant, which means it helps slough off dead skin cells that can build up on the outside of the skin. This can lead to dull, rough, and uneven skin. Chemical exfoliation with lactic acid can also:⁠ >> help unclog pores⁠ >> smooth out skin texture⁠ >> improve the appearance of dry, acne-prone, and mature skin