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另类“维生素”维生素，既不像蛋白质一样可以构成身体和生命活性物质，也不像脂肪和糖一样，可为人体提供能量。但一旦缺了它们，身体构成和能量供给都会出现异常，甚至中断；机体对维生素的需要量很小，通常用毫克、甚至微克这样小的单位来计算其数量。但就是如此小的需要量?
Alternative “vitamins” vitamins that neither form the body and vital components of the body like proteins, nor provide the body with the same energy as fat and sugar. But in the absence of them, the body composition and energy supply will be abnormal or even interrupted; the body needs a small amount of vitamins, usually milligrams, or even micrograms such small units to calculate the number. But is such a small demand?