Biotin is a water-soluble vitamin that's a part of the vitamin B family. It's also known as Vitamin H or Vitamin B7. It helps the boday metabolize fats,carbonhydrates,and protein,it also plays an important role in the health of your hair,skin,and nails.Water-soluble vitamins are not stored in the boday,so daily intake is necessary.In cosmetics and personal care products, Biotin is used primarily in the formulation of hair conditioners, grooming aids, shampoos and moisturizing agents. Biotin improves the texture of creams and adds body and shine to hair. Biotin has moisturizing and smoothing properties and can also help improve brittle nails.