Solgar Biotin 5000 mcg Vegetable Capsules (50). 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 μg can help support healthy looking hair and skin. As the body doesn’t make or store biotin, additionally, a daily dose of this B vitamin can help maintain the biotin levels your body needs.. 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