GSTM1 and Iron deficiency anemia: Lab analysis showed iron deficiency anemia (hemoglobin (Hb) 7.2 g/dL, normocytic and normochromic, serum iron 54.9 μg/dL, ferritin 146 ng/mL, and transferrin saturation (TSAT) 17%; serum folate 5.6 ng/mL and vitamin B12 1229 pg/mL).