Biotin is a water-soluble member of the B-complex group of vitamins and is commonly referred to as vitamin H. Biotin is a B-vitamin which assists in metabolism of fats, carbohydrates and protein.
Like other B-vitamins, biotin participates in a wide variety of enzymatic reactions (as a cofactor). The primary role of biotin is in the metabolism of fats, proteins and carbohydrates. As such, many claims can be made for biotin simply based on its role as a cofactor. The major benefit of biotin as a dietary supplement, however, is in strengthening hair and nails. In this role, biotin helps form and maintain chemical structures known as “crosslinks” within the main protein found in hair and nails (keratin). Maintenance of these crosslinks helps to promote hair and nail strength.
It’s estimated minimum daily requirement is between 30 mcg to 300 mcg.