The female uterus lining that's expelled during childbirth is called the placenta. Placenta products were aggressively marketed in the 1940s in the Unites States with claims of wrinkle removal and initiating tissue growth. Unfortunately, the U.S. Food and Drug Administration (FDA) disagreed and declared the products ineffective and the claims illegal. Shortly thereafter, placenta was declared a good source of protein. While this is true, it's not been proven to be any better for your skin than other proteins. In the right amounts, protein can be beneficial for your hair and skin. The placenta that's used in beauty creams today has been washed and processed many times over, ensuring that it's safe to use. The binding agents contained in the cosmetic also make it tough for any kind of bacteria to form. Because it's now FDA-approved, placenta still remains a popular beauty cream ingredient.