Want to get rid of that uneven skin tone from your arms? Lactic acid is here to help. It's a type of alpha-hydroxy acid (AHA) that's naturally found in milk and other dairy products. When used in body wash, it helps to exfoliate the skin by breaking down the bonds between dead skin cells, revealing smoother, brighter skin underneath. This summer reach out for these body washes that will leave your skin smooth and glowing.