Children and teens in the United States now get more than two-thirds of their calories from ultraprocessed foods, an analysis of almost two decades worth of data has found.

Ultraprocessed foods – such as frozen pizza, microwave meals, packaged snacks and desserts – accounted for 67% of calories consumed in 2018, up from 61% in 1999, according to research published in the medical journal JAMA Tuesday. The study analyzed the diet of 33,795 children and adolescents nationwide.

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