铁是维持人体正常生命活动所必不可少的营养素,铁在人体内按其作用可分为功能铁和贮存铁两类。功能铁占全身总铁的85%以上,其中最主要的就是血红素铁,它存在于红血球的血红蛋白和肌肉的肌红蛋白中,对体内氧的代谢、运输和肌肉活动起着极其重要的作用,而且是全身含铁量最多的一种功能铁, Iron is essential nutrients to maintain normal human life activities, iron in the body by its role can be divided into two types of functional iron and iron storage. Functional iron accounts for more than 85% of the total body iron, the most important of which is heme iron, which is present in hemoglobin of red blood cells and muscle myoglobin, which plays an extremely important role in oxygen metabolism, transport and muscle activity in the body , But also a function of the iron content of the body most iron,