Sources  ▪ PubMed  ▪ Scopus  ▪ Education Resource Information Center  ▪ Google scholar  ▪ Reference lists Search terms  ▪ Child  ▪ Kid  ▪ Youth  ▪ Adolescent  ▪ Teen  ▪ Nutrition  ▪ Diet  ▪ Eating habits  ▪ Food habits  ▪ Feeding behaviors  ▪ Peer  ▪ Peer led  ▪ Peer-led  ▪ School

Inclusion Criteria  ▪ included nutrition education that was led by peers (same age or older)  ▪ took place in a school (elementary or high school)  ▪ investigated outcomes for school-aged youth (5–18 years old)  ▪ took place in Canada or the United States  ▪ reported quantitative results  ▪ published in English  ▪ published between January 2000 and November 2013 Exclusion criteria  ▪ did not include an intervention or was not led by peers  ▪ did not include nutrition education  ▪ did not take place in a school  ▪ investigated outcomes for individuals <5 or >18 years of age  ▪ took place in a country other than Canada or the United States  ▪ did not report quantitative results  ▪ not published in English  ▪ published before January 2000 or after November 2013  ▪ not a peer-reviewed primary study

Full PubMed search strategy: (child* or kid* or youth* or adolescen* or teen*) and (nutrition or diet* or eating habit* or food habit* or feeding behavior*) and (peer* or peer led or peer-led) and (school*)