Energy Production Skin & Hair SupportBiotin is a water-soluble B vitamin typically found in liver, egg yolk, cereals, legumes and nuts. In the body, biotin is found in low concentrations in the brain, liver and muscle tissue. Biotin is utilized to synthesize intracellular carboxylase enzymes and is essential for normal skin and hair growth. The various carboxylase enzymes are important for lipid metabolism and energy production (ATP) via synthesis of oxaloacetate. Alcohol decreases biotin status in the body.