Iron deficiency and iron deficiency anemia are globalhealth problemsand common medical conditions seen in daily clinical practice.19 Iron deficiency is when the amount of iron neededby the body cannot be met due to some physiological consequences,including blood loss and limited dietary supply.19,20 The World Health Organization (WHO) defines iron deficiency anemiaas a hemoglobin (Hb) level of less than 13 g/dl in men and 12 g/dlin women.21 Iron deficiency is the mostcommon nutritional deficiency worldwide. The gene discussed is GSTM1; the disease is nutritional disorder.