Cleopatra was definitely onto something when she indulged in daily beauty treatment milk baths. It turns out the natural lactic acid found in milk is a form of alpha-hydroxy-acid (an ingredient which can be found in some of the most expensive exfoliating products). This type of acid gently dissolves proteins to exfoliate dead skin cells, which reveal fresh, younger looking skin underneath. Mixing milk with bathwater has been done for centuries as a quick and easy way to moisturize and soften your skin while you relax in the tub. The lactic acid found in milk is extremely mild, so dont worry, it wont strip or irritate the skin. In fact, milk is quite soothing on dry skin. Milk is also rich in vitamins and minerals most notably Vitamin E and zinc which help slow the process of aging and retain skins natural elasticity.