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众所周知,所谓必需的微量元素是指饮食必须含有构成人体总重量不足0.001％的那些元素,如铁是血红蛋白、肌红蛋白的组成成份,参与氧和二氧化碳的运输,缺乏它可导致贫血。但铁在人体内含量只有4～5克;再如锌在核酸和蛋白合成中起重要作用,在人体内已证实与50余种酶的活性有关,称为生命元素,但在体内含量只有2克…,除此之外,目前已知铜、铬、氟、碘、钴、硒,锰、钼、镍、锡、硅、矾等14种元素,其量虽微,但在生理上、生化上都起着重要作用,是人体营养与健康所必需的微量元素。
It is well-known that the so-called essential trace elements are that the diet must contain those that make up less than 0.001% of the total body weight. For example, iron is a component of hemoglobin and myoglobin involved in the transport of oxygen and carbon dioxide, which can lead to anemia in the absence of it. However, the content of iron in the human body is only 4 to 5 grams; another example of zinc in nucleic acid and protein synthesis plays an important role in the human body has been confirmed with more than 50 kinds of enzyme activity, known as the life element, but in vivo content of only 2 In addition, there are 14 kinds of elements such as copper, chromium, fluorine, iodine, cobalt, selenium, manganese, molybdenum, nickel, tin, All play an important role, is the trace elements essential for human nutrition and health.