Lactic acid is a mild exfoliant used in skincare for it’s great skin renewal and hydrating benefits. Lactic acid is in a group of acids called alpha hydroxy acids. Lactic acid is derived from milk or fruit sugars. Cleopatra, who was known for her beautiful skin, reportedly used sour milk on her skin for its renewal and anti- aging properties. Lactic acid has the ability to accelerate cellular turnover while...