Comparison of Effects of Iron and Multiple Micronutrient Supplementation on Hematological and Growth Indicators among Older Children, Adolescents, and Young Adults in Low- and Middle-Income Countries: A Systematic Review and Meta-Analysis of Randomized Controlled Trials

Overall, supplementation with iron compared with MMN had similarly beneficial effects on improving the hemoglobin level in older children, adolescents, and young adults, but there was some indication that there may be differential effects on growth indicators.