Niacin, also known as vitamin B3 and vitamin PP. in the human body, also includes its derivative ammonia hydrochloride or nikinamide, which is one of the 13 essential vitamins, is a water-soluble vitamin and belongs to the B vitamin group. Niacin is converted into nicotinamide in the human body, which is a component of coenzyme I and coenzyme II and is involved in the metabolic organization of lipids in the body, the oxidative process of respiration and the process of anaerobic decomposition of sugars. Niacin and niacinamide are soluble in water and alcohol; the nature of niacin and niacinamide is relatively stable and will not be destroyed under high pressure, 120,℃, 20 minutes. Once processed and cooked, the loss is minimal, but will be lost with water.