Small Preliminary Study: Cutting Ultra-Processed Foods Linked to Improved Depression Symptoms
In a small preliminary study, people with depression who dramatically cut ultra-processed foods experienced notable improvements in their symptoms. The researchers suspect that healthier eating may benefit the brain partly by reducing gut damage and chronic inflammation.
1. What the Research Says
This was a small preliminary study in people with depression who changed their diet. It reports an improvement in symptoms; whether the dietary change is the cause remains open.
2. How It Fits Earlier Research
Earlier studies point in the same direction: a better diet was linked to fewer depressive symptoms, and in treatment studies a change in diet was accompanied by improvement. The new study is small and preliminary, so it remains open whether cutting ultra-processed foods improves symptoms causally. A randomised controlled trial of dietary improvement for adults with major depression (the 'SMILES' trial). (2017) · Healthy dietary indices and risk of depressive outcomes: a systematic review and meta-analysis of observationa (2019) · A Mediterranean-style dietary intervention supplemented with fish oil improves diet quality and mental health (2019)
3. Source
ScienceDaily: Could quitting ultra-processed food boost your mental health? (2026-10-01)
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