铁是人体必需的微量元素之一,因为它是血红蛋白和肌蛋白的组成成分,参与氧和二氧化碳的运输。铁还是细胞色素和过氧化氢酶、过氧化物酶的组成成分,在呼吸和生物氧化过程中起重要作用。因此,过去曾强调,发育儿童、妇女尤其是孕妇、老年人和营养不佳的人直在饮食中多补充铁。 然而,今年初美国和芬兰的专家分别发表的两项 Iron is one of the essential trace elements of the human body because it is a component of hemoglobin and muscle protein involved in the transport of oxygen and carbon dioxide. Iron is also a cytochrome and catalase, a component of peroxidase, which plays an important role in respiratory and bio-oxidation processes. Therefore, it has been stressed in the past that children in developing countries, especially pregnant women, the elderly and undernourished people, are constantly supplementing their diet with iron supplements. However, two of the United States and Finland experts issued earlier this year respectively