B Complex LiquidItem Description B vitamins play important roles in nearly all of the physiological systems in the body. Some of the key supportive roles include nutrient and energy metabolism; as well as the production of DNA, hemoglobin, neurotransmitters, and hormones. Optimal levels of B vitamins have been associated with cellular, cardiovascular, neurological, and psychological health. B vitamins are essential to basal mitochondrial function as metabolic