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铁(Fe)是人体必需微量元素之一,其营养水平对维持人体健康、抵御疾病起着重要的作用。一方面铁缺乏仍是全球,特别是发展中国家最主要的营养问题之一。与此同时,铁过量问题也已成为发达国家(地区)的一个突出的公共卫生问题。2005年在我国北京上海开展的一项涉及3289名50～70岁中老年人的调查显示,该人群的铁过量比例男性达到10.6%,女性达到14.7%[1]。相类似的,美国第III次营养监测数据显示,28%的美
Iron (Fe) is one of the essential trace elements of the human body, and its nutritional level plays an important role in maintaining human health and protecting against diseases. On the one hand, iron deficiency is still one of the major nutritional problems in developing countries, especially the world. In the meantime, the problem of iron overload has also become a prominent public health problem in developed countries (regions). A survey of 3289 middle-aged and elderly people aged 50-70 years in Beijing, China, in 2005 showed that 10.6% of females had an iron overload ratio and 14.7% of females [1]. Similarly, the United States III nutrition monitoring data show that 28% of the United States