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铁是机体维持生命活动的重要元素之一。正常人维持体内铁平衡需每天从食物中摄取铁1~1.5mg,孕、乳妇2~4mg。人体内铁的正常含量为新生儿75mg/kg,成年男性50mg/kg,女性为35mg/kg,其中64%的铁在体内存在于血红蛋白(Hb)中,32%以铁蛋白含铁血红素形式贮存于肝、骨髓及其它脏器中,另有0.4%以转运铁存在于血浆,0.4%存在于含铁的酶中,另有3.2%合成肌红蛋白。铁的供应,2/3来自于衰老的、被破坏的红细胞,释放的铁几乎全部被利用,另1/3从食物中摄取:动物性食物含铁高吸收率也
Iron is one of the most important elements of the body’s life-sustaining activity. Normal iron balance in the body to maintain the body needs daily intake of iron from food 1 ~ 1.5mg, pregnant, breast-feeding 2 ~ 4mg. Normal levels of iron in the human body are 75 mg / kg for newborns, 50 mg / kg for adult males and 35 mg / kg for females, with 64% of the iron present in the body in hemoglobin (Hb), 32% in the form of ferritin, Stored in the liver, bone marrow and other organs, the other 0.4% in the transport of iron in the plasma, 0.4% exists in iron-containing enzymes, while the other 3.2% myoglobin. Iron supplies, two-thirds from aging, ruined erythrocytes, released almost all of the iron used, and the other one-third from food intake: animal foods high iron absorption rate also