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News
A new crossover pilot trial published in JAMA Psychiatry found that patients with major depressive disorder (MDD) who reduced their ultra-processed food (UPF) intake saw meaningful improvements in both depression and anxiety scores. The small but promising study suggests dietary changes could become a viable add-on strategy in psychiatric care.
Cutting ultra-processed foods may ease depression and anxiety symptoms
A crossover pilot trial published in JAMA Psychiatry found that patients with major depressive disorder (MDD) who cut back on ultra-processed foods (UPFs) experienced significant reductions in both depression and anxiety symptoms. Researchers at UCSF enrolled 20 adults with MDD and high baseline UPF consumption, randomly assigning them to either a low-UPF diet or their usual diet before crossing over. Mean UPF intake dropped dramatically — from a score of 10.1 at baseline to just 1.42 post-intervention.
The trial also confirmed feasibility: participants rated the intervention as easy and useful, paving the way for larger clinical trials. While the study was small, open-label, and relied on self-reported dietary data, the consistent improvements across four validated mental health scales were notable.
By the Numbers:
Why it matters: With depression affecting hundreds of millions globally, dietary interventions offer a low-cost, accessible complement to existing treatments. Experts are now calling for routine nutritional assessment to become part of standard psychiatric care.
