Since 1947 Supports Healthy Skin, Nails & Hair Halal Non-GMO Gluten, Wheat & Dairy Free Suitable for Vegan Certified Gluten-Free Kosher Parve Dietary Supplement Biotin 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, and is required for protein, carbohydrate and fat metabolism.