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A study at Ohio State University found that those who at fast food every day saw test scores improve 20 percent less than those who didn't over three years. The test started when children were 10 years old, and compared test scores in reading, math and science.

Even when researchers took other variables into account, the fast food seemed to have a significant effect.

Read The Washington Post's full breakdown, or check out the original study (Note: Most of the study is behind a paywall.)

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Third grade English/language arts and social studies teacher Taj Cole (center) assists students with a lesson at Hollis Innovation Academy in Atlanta on Thursday, Aug. 14, 2025. (Natrice Miller/AJC)

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An aerial view captures a large area under construction for a new data center campus on Thursday, May 29, 2025. Developed by QTS, the data center campus near Fayetteville is one of the largest under construction in Georgia. (Miguel Martinez/AJC)

Credit: Miguel Martinez-Jimenez