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对老年人尤其是75岁以上老年人铁营养状态的研究不多。由于铁的功能对于生命是必不可少的。因此有必要对老年人铁营养状态作一研究。最近Davis的研究证明放射性铁的吸收随年龄增长而减少,这是否为一种与年龄相关的表现,还是由于铁储存增加的正常反应尚不清楚。肉类是铁吸收的一种重要的缮食性促进剂,因为肉类含有的血红素铁,比其它食物中的铁更易于吸收。美国营养学调查证明在老年肉类摄入量减少,因而有可能改变了铁的生物利用率。老年男性和女性从肉类消费中获得的食物铁分别仅为18.7％和14.3％,相比之
There is not much research on the state of iron nutrition in the elderly, especially the elderly over 75 years old. Because iron’s function is essential to life. Therefore, it is necessary to study the status of iron nutrition in the elderly. A recent Davis study demonstrates that the absorption of radioactive iron decreases with age, whether this is an age-related manifestation or whether the normal response to increased iron storage is unclear. Meat is an important steal enhancer of iron absorption, because meat contains heme iron, which is more readily absorbed than iron in other foods. A US nutrition survey has shown that there is a reduction in the intake of meat in the elderly, which may change the bioavailability of iron. Iron from the consumption of meat by older men and women was only 18.7% and 14.3% respectively, compared with