1. US Census Bureau. Age and Sex Composition: 2012 Census Briefs. Available at https://www.census.gov/population/age/data/2012comp.html. Accessed February 14, 2017
2. Relationships between vitamin and mineral supplement use, dietary intake, and dietary adequacy among adolescents;J Am Diet Assoc,2000
3. US Department of Agriculture, Agriculture Research Service. What we eat in America. NHANES 2013–2014. Available at: https://www.ars.usda.gov/northeast-area/beltsville-md/beltsville-human-nutrition-research-center/food-surveys-research-group/docs/wweia-data-tables/. Accessed February 14, 2017
4. Fruit and vegetable consumption of U.S. Youth, 2009–2010;NCHS Data Brief,2014
5. Fruit and vegetable consumption among high school students—United States, 2010;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2010