SEARCH Articles Figures Tables NIACIN, NICOTINAMIDE, AND NICOTINIC ACID Niacin Niacin (Vitamin B3) and Nicotinamide Adenine Dinucleotide Phosphate (NADP Niacin Nicotinamide Nicotinic acid Niacin Nicotinamide adenine dinucleotide Niacin Nicotinamide adenine dinucleotide phosphate, reduced (NADPH Niacin nicotinamide ring Nicotinamide adenine dinucleotide niacin metabolism Nicotinamide adenine dinucleotide niacin source Nicotinamide adenine dinucleotide phosphate niacin metabolism Nicotinamide adenine dinucleotide phosphate niacin source