Biotin is a water-soluble B vitamin. It helps maintain healthy skin, nails, and hair, and is necessary for certain enzymes to function properly.* Biotin also supports cellular energy production in the body by converting food into energy and is necessary for the metabolism of proteins, carbohydrates and fats. How to use: As a dietary supplement for adults, take one (1) vegetable capsule daily, preferably with meals or as directed by a health professional.