...oxidized to produce 1 mg of niacin (NRC, 1980). Hundreds of enzymes in the body require niacin in its coenzyme forms nicotinamide adenine dinucleotide (NAD)...nicotinamide adenine dinucleotide phosphate (NADP). Many reactions utilizing these enzymes are involved in energy metabolism. Hence, the 1980 RDA is set...

...Nomenclature l . Plant source — niacin (nicotinic acid) 2. Animal source — niacinamide (nicotinamide) 3. Coenzyme forms — nicotinamide adenine dinucleotide...nicotinamide adenine dinucleotide phosphate (NADP) B . Absorption/transport/storage/excretion l. Easily absorbed from the stomach and intestine. 2. Converted...

...group at this same carbon defines the structure as nicotinamide. Niacin is active in the human body in two coenzyme forms: nicotinamide adenine dinucleotide...nicotinamide adenine dinucleotide phosphate, (NADP). Both are involved in electron transfer operations. COOH — c: NH2 Nicotinic Acid Nicotinamide (Niacin)...

...acid can easily be converted into nicotinamide, which is the active form of the vitamin. Niacin exists in two coenzyme forms, nicotinamide adenine dinucleotide...nicotinamide adenine dinucleotide phosphate (NADP). NAD and NADP are like the riboflavin coenzymes in that they accept (NADPH, NADH) and donate (NADP,...