Biotin Supplement for healthy & strong hair: Biotin is a vitamin B supplement that is very essential for full body nurturing, hence plays a key role in the growth and maintenance of your hair, skin and nails. For hair growth, biotin helps in producing fatty acids and cell growth that increases the size of hair follicle, hence helps hair to appear thicker. Increases energy & metabolism: Biotin is a water-soluble vitamin that acts as a coenzyme in the metabolism of proteins, fats and carbohydrates, hence increases overall energy and metabolism.