Solgar Biotin 5000 mcg Vegetable Capsule contains biotin, a water-soluble B-vitamin. It helps to support healthy skin, nails and hair, and is necessary for certain enzymes to work properly. Biotin also supports cellular energy production in the body by converting food into energy, and is required for protein, carbohydrate, and fat metabolism. Perhaps best known for its beauty supporting benefits, a daily dose of Solgar's Biotin 5000 mcg can help support healthy looking hair and skin. Although Biotin deficiency is rare it may result in thinning hair, brittle nails and a red scaly rash around the mouth and eyes. 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