Sundown Naturals Hair, Skin & Nails provides nourishment from the inside, so you can look and feel your best. Our formula delivers 17 essential vitamins and minerals including Biotin and Vitamin C, which are both well-known for the way they nutritionally support hair, skin and nail health. Each serving of Sundown Naturals Hair, Skin, Nails Caplets provides 5, 000 Mcg of Biotin. Additionally, Sundown Naturals Hair, Skin, Nails caplets are certified gluten-free and Non-GMO. Clean defined as all products non-GMOˆ, and free of gluten, wheat, dairy, lactose and artificial flavors.