"[But] if you take junk food and sodas out of schools, kids don't eat as much of them and are healthier," Nestle said. "If you have strict nutrition standards for school food, the food is healthier and so are the kids. This may seem self-evident, but now we have research to prove it."
For more on the U.S. National School Lunch Program, visit the U.S. Food and Nutrition Service.
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