Biotin is a water-soluble B vitamin that contributes to several functions in the body including energy metabolism. Perhaps best known for its beauty supporting benefits, a daily dose of Solgar's Biotin 5000 ?g can help support healthy looking hair and skin. , , Biotin: , Contributes to improvement of nails resistance , Contributes to maintenance of normal skin , Is necessary for healthy teeth, bones, hair and nails , Is necessary to maintain energy and general vitality , Contributes to normal functioning of the nervous system