Promotes hair, skin, and nail health Supports energy production Water soluble B-complex vitamin Potency and quality guaranteed Look and feel your best with award-winning Carlson Biotin. Biotin, also known as vitamin B-7, is one of the eight important B complex vitamins. Biotin supports energy production; plays a role in many of our body’s metabolic functions; and helps nourish healthy hair, skin, and nails. Since biotin is not synthesized by the body, we must obtain it through our diet or a supplement. Each capsule provides 5,000 mcg of Biotin.