GSTM1 and anemia (phenotype): On the other hand, moderate anemia defined as the Hb value of 7.0–9.9 g/dl for pregnant women and 6–59-month children and 8.0–10.9 g/dl for 5–11-year-old children; 12–14-year-old children, non-pregnant women, and adult men while severe anemia is defined as the Hb value less than 7.0 g/dl for pregnant women and 6–59 months of children; and less than 8.0 g/dl for 5–11-year-old children, 12–14-year-old children, non-pregnant women, and adult men [2].