Nutrition: Biotin is a member of the water-soluble B-vitamins and has been known in the past as vitamin B7 and vitamin H. Biotin plays an important role in the metabolism of fatty acids and leucine and is important for gluconeogenesis. As a component of five enzymes, biotin plays a critical role in the Citric Acid (Kreb’s) Cycle and the production of energy from food. Biotin is actually produced by the bacteria in our guts but it is unclear how much is required in the diet. Biotin deficiency is rare but can occur in persons consuming large quantities of raw egg whites. Biotin is found in high quantities in meats and fish. Toxicity symptoms are unknown for biotin.