Now Solutions Hair, Skin and Nails works at the cellular level to promote natural beauty from within. This completely formula offers the amino acids and minerals that are essential for the production of collagen and keratin, which are the main structural components of hair, skin, and nails. This formula also has the antioxidant vitamins C and E, which help protect skin from free radicals, as well as biotin and hyaluronic acid, which can also support healthy, youthful skin.