What is Niacin?

Is a water soluble vitamin B3 (found in beans, green vegetables, mushrooms, peanuts) Is a precursor to NAD+/NADH and NADP+/NADPH, which play essential metabolic roles in living cells Is involved in both DNA repair, and the production of steroid hormones in the adrenal gland Is administered orally Is converted to Nicotinamide in the body (same activity as Niacin)