Biotin, or Vitamin 7, is a water-soluble vitamin. Supplementary work with vitamin B2, vitamin B6, niacin and vitamin A are important for fat and protein metabolism. Contributes to energy production Necessary for the synthesis of body enzymes Helps to nourish skin, hair, muscles and nerves. Prevent gray hair prematurely. Relieves dermatitis, rashes, prevention and treatment of dry, brittle nails.