Nature's Bounty QD Biotin 5000mcg Capsules contains Biotin, that is a water-soluble vitamin found in oatmeal, vegetables, and soy. As part of the B-family of vitamins, biotin support energy metabolism and aids in the conversion of food into energy. In addition to this, Nature's Bounty QD Biotin 5000mcg Capsules also helps to support healthy hair, skin and nails.