Reducing ultra-processed foods to help with depression

Assessing the Feasibility and Acceptability of the Reduction of Ultra-processed Foods From the Diets of a Subset of Patients With Depression - A Pilot Open Label Crossover Trial.

Not applicable Interventional University of California, San Francisco · NCT06252701

This study is testing if cutting down on ultra-processed foods can help people with major depression feel better while they continue their usual medication and therapy.

Quick facts

PhaseNot applicable
Study typeInterventional
Enrollment15 (estimated)
Ages18 Years to 80 Years
SexAll
SponsorUniversity of California, San Francisco Academic / other
Locations1 site (San Francisco, California)
Trial IDNCT06252701 on ClinicalTrials.gov

What this trial studies

This pilot open label crossover trial aims to assess the feasibility and acceptability of reducing ultra-processed foods (UPF) in the diets of patients with major depressive disorder who consume a high percentage of UPF. The study is based on the hypothesis that a reduction in UPF intake may positively impact depressive symptoms. Participants will be required to maintain their current psychotropic medication and psychotherapy regimen while attending in-person visits at UCSF. The study will evaluate the intervention's practicality and participants' willingness to adhere to dietary changes.

Who should consider this trial

Good fit: Ideal candidates are adults aged 18-80 with major depressive disorder who consume a significant amount of ultra-processed foods.

Not a fit: Patients with recent psychiatric hospitalization, severe mood states, or significant gastrointestinal issues may not benefit from this study.

Why it matters

Potential benefit: If successful, this intervention could provide a novel dietary approach to augmenting treatment for patients with major depressive disorder.

How similar studies have performed: While the relationship between diet and depression has been explored, this specific approach of reducing UPF in a personalized manner is relatively novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* 18-80 year olds (inclusive), all race/ethnic groups
* Willing to not change psychotropic medication or psychotherapy regimen during the study
* Willing and able to come to UCSF for in person visits two times
* Ability to speak and read English and answer participant surveys

Exclusion Criteria:

* Psychiatric hospitalization in past 3 months
* Active suicidal ideation with intent and plan or scoring a 3 or higher on the Columbia suicide severity rating scale (C-SSRS)
* In a current severe mood state when entering the study that would prohibit compliance with study visits or dietary program
* Known GI abnormalities or known GI medical problems (diarrhea, chronic intestinal disease, toxic megacolon, ileum) or known swallowing or chewing disorders or issues
* Anticipating or planning any major changes in physical activity or sleep during the study
* Pregnant or planning to be pregnant during the study
* Breastfeeding or planning to breastfeed during the study

Where this trial is running

San Francisco, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions DepressionMajor Depressive DisorderWeight GainObesityMetabolic SyndromeUltra-processed FoodDiet
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.