Milk has been used for thousands of years as a luxury beauty treatment. Cleopatra is said to have bathed in milk and flowers to keep herself looking young and beautiful. The lactic acid in milk is an alpha hydroxy acid and helps rejuvenate skin cells. Powdered milk and honey can be combined to make a pasty cleanser that will help with an oily complexion. It can also tighten the skin and shrink large pores, helping to prevent premature aging.