Mean Hb (10.08 ± 0.65 vs. 10.02 ± 0.63 g/dL; p = 0.678) and serum ferritin (9.87 ± 0.90 vs. 9.65 ± 1.23 ng/mL; p = 0.394) of the mothers in the control and intervention groups, respectively, were not different and were consistent with the iron deficiency state. This evidence concerns the gene GSTM1 and nutritional disorder.