GSTM1 and anemia: Definitions vary by age, with anaemia and severe anaemia classified as Hb<11g/dl and Hb<7g/dl in children aged 6-59 months.(2) Prevalence and years lived with disability are highest in Sub-Saharan Africa and South Asia where nutrient deficiencies, infectious diseases and haemoglobinopathies are common.(1, 3) Children under five years of age are most vulnerable, with an estimated prevalence of 56.5% in Low-and Middle-Income Countries (LMICs).(4)