Nicotinamide, also known as nicotinamide, vitamin B3 or vitamin PP, is a water-soluble vitamin, belonging to the B group of vitamins, coenzyme I (nicotinamide adenine dinucleotide, NAD) and Coenzyme II (nicotinamide adenine dinucleotide phosphate, NADP) components, In human body, the niacinamide part of these two coenzyme structures has reversible hydrochemicalbook and dehydrogenation properties, plays a role in hydrogen delivery in biological oxidation, can promote tissue respiration, biological oxidation process and metabolism, and has important significance for maintaining the integrity of normal tissues, especially the skin, digestive tract and nervous system. When lacking, pellagra is caused by the affected respiration and metabolism of cells, so this product is mainly used for the prevention and treatment of pellagra, stomatitis, glossitis and so on.