(CNN) — A new study suggests a possible link between unhealthy food and depression in teenagers.
Researchers at the University of Alabama at Birmingham analyzed 84 middle schoolers from low-income communities.
Tests found high levels of sodium an low levels of potassium in the group, and they also saw symptoms of depression with the children and their parents.
A year and a half later, researchers tested the group again and noticed more signs of depression.
According to the researchers, high sodium indicates a diet of processed foods and unhealthy snacks.
The low potassium meanwhile can come from a lack of healthy fruits and vegetables.
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