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维生素是维持身体健康所必需的一类有机化合物。这类物质在人体内既不是构成身体组织的原料,也不是机体能最产生的来源,而是一类调节物质在物质代谢中起重要作用。这类物质由于体内不能合成或合成不足,虽然需要量很少(每日仪以毫克或微克计算),但必须依赖食物的经常供给,才能保持机体的正常需要。所以人体离不开维生素。然而,不同的人对维生素
Vitamins are a type of organic compound necessary to maintain good health. Such substances in the human body is neither the raw material constituting the body tissue, nor the body can produce the most source, but a class of regulatory substances play an important role in the material metabolism. Since such substances can not be synthesized or synthesized in the body, although they are in small quantities (milligrams or micrograms per daily instrument), they must rely on the regular supply of food in order to maintain the normal needs of the body. So the body can not do without vitamins. However, different people to vitamins