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正常人体所需要的营养除了蛋白质、脂肪、碳水化合物和维生素外,尚需一些无机物如铁、钙、磷等,人们根据对无机物需要量的不同,将它分为二类,每天消耗量较大的叫宏量元素,如钾、钠、钙等;消耗量较小的叫微量元素,如铁、碘、铜等。人体锌的消耗量每天为5～6毫克(妇女怀孕期和哺乳期另加7～8毫克)属于微量元素,虽说锌是微量元素,它在人体内总量也有1.36～2.32克。一般动、植物中都有微量的锌,因而在日常膳食中通常能摄入足量的锌,以保证正常人体的需要,为摄入量过多时,锌便和蛋白质在肝脏内结合成锌硫蛋白贮存起来,以
In addition to protein, fat, carbohydrates and vitamins, the body needs nutrients such as iron, calcium, phosphorus, etc. According to the different needs of inorganic substances, it is divided into two categories, daily consumption The larger called macro elements, such as potassium, sodium, calcium; consumption of smaller called trace elements, such as iron, iodine, copper and so on. Zinc consumption of 5 to 6 mg per day (women during pregnancy and lactation plus 7 to 8 mg) are trace elements, although zinc is a trace element, it also has a total amount of 1.36 ~ 2.32 grams in the human body. Generally, animals and plants have a trace of zinc, so in daily diet can usually intake sufficient zinc to ensure the normal human needs, when intake is too much, zinc and protein in the liver combine into zinc and sulfur Protein stored together