GSTM1 and anemia (phenotype): In this study, we extend the research emerging from the 2015 ENMS to investigate the associations of Ca, Co, Cu, Mg, Mo, se and Zn, in addition to inflammation markers, nutritional status and non-nutritional factors (sex, age, household head literacy, residence, stool parasite and health status), folate with Hb and the risk of anaemia.