GSTM1 and anemia: In contrast, supplementation of 6–18 months old children with MQ-LNS (46 to 70 g, containing 400 μg vitamin A, 9 mg iron and 9 mg zinc per 46 g) did not affect iron status, Hb concentration or prevalence of anemia during an efficacy trial in rural Honduras compared to a control population who received, similarly to the intervention population, food vouchers and nutrition counselling [20].