Study links diet to mental health in teens

A study involving 6,537 middle and high school students in Australia has found a connection between diet and the risk of depression and anxiety in adolescents. The research was conducted over three years and aimed to understand how eating habits might influence mental health outcomes in young people.

Research scope and methodology

The study was carried out by the University of Sydney as part of the Health4Life program, which is coordinated by the Matilda Centre for Research in Mental Health and Substance Use. It followed students from 71 schools across three Australian states and focused on those who had not yet met the criteria for depression or anxiety at the beginning of the study.

Tracking diet and mental health

Researchers compared what the students ate and drank with their mental health status, using two standardized questionnaires: PHQ-A-8 for depression and PROMIS-AP for anxiety. These tools helped identify students who developed symptoms that met the thresholds for these conditions during the study.

Fruit consumption linked to lower risk

The findings showed that eating more fruits was associated with a lower risk of developing depressive and anxious symptoms. Each additional daily portion of fruit was linked to a 13% decrease in the risk of depressive symptoms and a 7% decrease in the risk of anxious symptoms among the students.

Sugary drinks linked to higher risk

In contrast, the study found that consumption of sweetened beverages, such as sodas and sports drinks, was associated with an increased risk of developing symptoms of depression and anxiety. This highlights the potential impact of dietary choices on adolescent mental health.