缺铁普遍存在于世界各地,对人体多方面功能有不良影响,病因较复杂,因此引起广大学者的一致重视。多数学者认为:以缺铁的发展为依据,可将缺铁分为三期。最初阶段,铁耗竭期(iron depletion,ID期),即储存铁开始减少,这时血清铁蛋白(SF)减少;第二阶段,红细胞生成缺铁期(iron deficlent erythropoies is.IDE期),即铁储存耗竭,血清铁水平下降,红细胞生成损害,红细胞游离原卟啉(FEP)升高,但此时尚无贫血出现;第三阶段,缺铁性贫血期(iron Iron deficiency is widespread in many parts of the world and has adverse effects on many aspects of the human body. The causes are complicated, and this has aroused the unanimous attention of the majority of scholars. Most scholars believe that: based on the development of iron deficiency, iron deficiency can be divided into three phases. In the initial stage, the iron depletion period (ID), that is, the storage iron began to decrease, the serum ferritin (SF) decreased at this stage. In the second stage, the iron deficlent erythropoies is. Depletion of iron stores, decreased serum iron levels, impaired erythropoiesis, increased erythrocyte free protoporphyrin (FEP), but no anemia was present at this time; in the third stage, iron