GSTM1 and anemia: Lower Hb at endline vs. baseline among intervention (10.1 g/dL vs. 11.4 g/dL) and control children (9.8 g/dL vs. 11.1 g/dL), and intervention (11.2 g/dL vs. 12.3 g/dL) and control mothers (11.0 g/dL vs. 12.3 g/dL) Higher anemia at endline vs. baseline among children in intervention (50.5% vs. 16.7%) and control groups (55.6% vs. 21.9%)