Member's Mark Biotin 10000 mcg with Keratin 100 mg is a dietary supplement that may support healthy hair, skin and nails. This formula combines biotin, a water-soluble B vitamin involved in protein, fat, and carbohydrate metabolism, with keratin, vitamin C, and zinc. Biotin plays a role in metabolism and cell energy production. Vitamin C is an antioxidant that supports immune health and is important for bones, muscles, blood vessels, teeth and gums. Zinc also supports immune function and has antioxidant properties to help protect cells. Contains 10,000 mcg of Biotin per capsule Includes 100 mg of Keratin With Vitamin C and Zinc No artificial colors or flavors Gluten-free Lactose-free Ingredients Keratin, Dicalcium Phosphate, Zinc Gluconate, Hydroxypropyl Methylcellulose, Ascorbic Acid, Biotin. Contains 2% or less of: Magnesium Stearate, Silica. Suggested Use> Adults, take one capsule daily with food as a dietary supplement.