Promotes Healthy Hair, Skin & Nails Plus Clinical Strength Lutein for Improved Skin Elasticity & Hydration Vegetarian Dietary Supplement Natrol Biotin Plus with Lutein: 10 mg Lutein - clinical strength skincare shown to improve skin elasticity and hydration when taken daily. 5,000 mcg Biotin - supports healthy hair, radiant skin and stronger nails. Helps support energy metabolism and aids in the conversion of food into energy. Clinical studies have shown that those deficient in Biotin can experience hair loss and brittle nails.