Iron deficiency anemia is a type of anemia caused by a lack of storage iron in the body, affecting the synthesis of hemoglobin. It is characterized by a lack of available iron in tissues and organs such as bone marrow, liver, and spleen, with decreased serum iron concentration, transferrin saturation, and serum ferritin levels. Typically, iron deficiency anemia presents as microcytic hypochromic anemia. Iron, as one of the essential trace elements in the human body, is contained in all functioning cells and is broadly involved in metabolic processes within the body. Therefore, the treatment principle for iron deficiency anemia involves replenishing sufficient iron until normal iron stores are restored and addressing the underlying causes that led to the iron deficiency to effectively and quickly replenish iron. Oral iron supplements are the preferred treatment option for iron deficiency anemia, such as ferrous sulfate, ferrous succinate, and iron dextran which are effective oral iron agents.