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Cut Processed Foods for Better Mental Health
25 Sep
Summary
- Reducing ultra-processed food intake can significantly improve depression.
- A preliminary study found an 85% reduction improved depression scores.
- Diet changes may aid mental health alongside therapy and medication.
Reducing consumption of ultra-processed foods may positively impact mental health, according to recent research published in JAMA Psychiatry on September 23, 2026. This preliminary study, involving 20 participants, is the first to compare depression symptoms before and after a dietary shift away from highly processed items.
Participants who decreased their ultra-processed food intake by 85 percent experienced significant improvements in depression. Specifically, scores on the MADRS scale dropped by 63 percent, and reductions of around 60 percent were observed on the PHQ-9 and QIDS measures. These findings suggest a strong correlation between diet and mood.
Experts theorize that the impact of ultra-processed foods on mental health could stem from their high macronutrient content, calorie density, or the presence of additives and contaminants. These foods, engineered for palatability, can affect the brain's reward system and lead to blood sugar fluctuations that influence mood and energy levels.
While more extensive research is needed, experts emphasize that dietary changes can be a valuable component of depression treatment, working alongside established methods like therapy and medication. Policy-level changes, such as clearer labeling and improved access to whole foods, are also being explored to support healthier eating patterns.
