Previous studies show iron deficiency anemia with prolonged exclusive breast feeding.10 In another study in China breast fed babies had low Hb than formula feed which points to the need of iron fortification for breastfed babies11 and early interruption of breast feeding as also been linked with iron deficiency anemia.7 Maternal Hb is associated with exclusively breast feeding in another study.12 In our study top fed children had significant association with Vit B12 deficiency anemia (p= 0.006) but we did not ask about weaning and use of vegetable based nutrition. The gene discussed is GSTM1; the disease is anemia.