Anti - anemia drugs. Iron is the main component of hemoglobin and myoglobin. Hemoglobin is the main oxygen carrying person in red blood cells. Myoglobin muscle cells store oxygen in the body to help oxygen supply during muscle movement. Most enzymes related to the three carboxyl cycle contain iron, or only when iron exists. Therefore, after the iron deficiency patients are actively supplemented with iron, in addition to the acceleration of hemoglobin synthesis, the related symptoms such as growth retardation, action abnormality, physical insufficiency, mucosal tissue changes and skin nail lesions can be gradually corrected with the acceleration of hemoglobin synthesis.