The physiological function of vitamin PP

Vitamin PP, vitamin niacin, also known as nicotinic acid, the chemical name for nicotinic acid or nicotinamide, both in vivo into each other. Nicotinic acid as a white needle-like crystal, slightly soluble in water; nicotinamide as a white crystal, soluble in water. Medicinal are generally nicotinamide, because there is a time of niacin vasodilation. This vitamin is more stable, in general cooked without a loss of live. Nicotinamide in the body and the ribose, phosphate, adenine formed Dehydrogenase Coenzyme coenzyme Ⅰ and Ⅱ. The two coenzyme nicotinamide part of the structure has a reversible hydrogenation and dehydrogenation of the characteristics of the bio-oxidation plays a role in delivery of hydrogen. Sugar, fat and protein metabolism in both in need of such coenzymes participate. Yeast, peanuts, liver, fish and lean meat content in a rich, but also industrial synthesis. The human body needs about 20 mg per day. People lack this vitamin, the performance of neural dystrophy, initially malaise, later in his hands, cheeks, left and right places and other exposed parts of the symmetry dermatitis occurs. Large doses of niacin can be expansion of the small blood vessels and lower blood cholesterol levels; clinically is often used to treat inner ear vertigo, peripheral vascular disease, hypercholesterolemia, optic nerve atrophy.