Biotin is a water-soluble B-vitamin that contributes to several functions in the body, including energy metabolism. 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, a daily dose of this B vitamin can help maintain the biotin levels your body needs. Biotin contributes to the improvement of nail resistance, the maintenance of normal skin, and is necessary for healthy teeth, bones, hair, and nails. It also contributes to maintaining energy-yielding metabolism and general vitality, and to the normal functioning of the nervous system. This product is vegan and cruelty-free. Ingredients: Bulking Agent: maltodextrin, Vegetable Capsule Shell: hydroxypropylmethyl cellulose, Anti-caking Agents: (silicon dioxide, vegetable magnesium stearate), D-biotin.