Nicotinic acid, also known as vitamin B3, is mainly found in animal organs and muscle tissue and also exists in trace amounts in fruits and egg yolks. It is one of the 13 essential vitamins, belonging to the B vitamins, heat-resistant, and capable of sublimation, and is a water-soluble vitamin. Nicotinic acid can be converted into nicotinamide in the human body, involved in the synthesis of coenzyme I and coenzyme II, the body's lipid metabolism, the oxidation of tissue respiration, and the anaerobic decomposition of sugars have an important role.
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