Since 1947 Super Potency Supports Skin, Nails & Hair Gluten, Wheat & Dairy Free Suitable for Vegans Non-GMO K-Parve Dietary SupplementBiotin is a water-soluble B-vitamin. It helps to support healthy skin, nails and hair, and is necessary for certain enzymes to work properly. Biotin also supports energy production in the body by converting food into energy, and is required for protein, carbohydrate, and fat metabolism.