Based on studies, it was found that if the following information was provided to women by their healthcare providers, it increased awareness and compliance toward anemia treatment: (1) their hemoglobin (Hb) level during pregnancy and breastfeeding, (2) the adverse effects of anemia during pregnancy and on the developing fetus, and (3) the side effects of iron and folic acid supplements [21,22]. The gene discussed is GSTM1; the disease is anemia (phenotype).