by Sara Fulton and Vanessa Campa
Exfoliation for skin health and rejuvenation is as old as the quest for beauty itself. Ancient Egyptians and Greeks discovered the benefits of exfoliation centuries ago, utilizing elements like alabaster, oils, and salt.
Cleopatra bathed in milk as a mainstay of her beauty regimen. She may not have understood the science behind it, but she was taking advantage of milk's lactic acid, an alpha hydroxy acid that digests protein, thereby removing the top layer of dead skin and stimulating cell renewal.