Since 1947 Supports Healthy Skin, Nails & Hair Non-GMO Suitable for Vegans K-Parve Dietary SupplementBiotin is a water-soluble B-vitamin. It helps to promote healthy skin, nails and hair, and is necessary for certain enzymes to work properly. Biotin also supports energy production in the body, and is required for protein, carbohydrate, and fat metabolism.