Processed food diet linked to heart risk – small study tests if cutting them helps arteries
NCT ID NCT05628350
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested whether reducing ultra-processed foods (UPF) can improve blood vessel function in middle-aged adults, a key factor in heart disease. Seventeen participants ate either a diet with no UPF or one with high UPF for six weeks. Researchers measured changes in artery function and looked at gut health as a possible mechanism. This is a small, early-stage trial to gather initial evidence for a larger study.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- controlled diet without ultra-processed foods
- What this could lead to
- If it works, this could point toward a dietary approach to improve vascular health in middle-aged adults.
- What could go wrong
- This is a very small, early proof-of-concept study with only 17 participants. Results may not apply to the general population, and the diet is highly controlled, making real-world adoption challenging.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
-
17 people
The number who actually took part.
- Started
-
Jul 2023
- Finished
-
Sep 2025
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
40 to 65 years
- Sex
-
Anyone
- Healthy volunteers
-
Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Weight stable for previous 6 months (\<2 kg change) * Sedentary to recreationally active * No plans to gain/lose weight or change physical activity level * Willing to pick up food daily and consume foods provided for an 8-week period * Verbal and written informed consent * Approval by Medical Director * Usual UPF intake +/-15% of US average of 60% total energy * Estrogen or testosterone usage is acceptable, if on stable dose for \>6 months * Lipid-lowering medication usage is acceptable, if on a stable dose for \>6 months Exclusion Criteria: * BMI \>35 kg/m2 * Diabetes or diabetes medication * Antibiotic, prebiotic or prebiotic use in prior 3 months * Total Cholesterol \>6.2 mmol/L; Triglycerides \>4.5 mmol/L * Blood pressure (BP) \> 159/99 mmHg (Stable BP on antihypertensive medications is acceptable) * Diagnosed inflammatory bowel disease * Past or current heart diseases, stroke, respiratory disease, endocrine or metabolic disease, or hematological-oncological disease * Vegetarian or vegan * Pregnant or plans to become pregnant * Food allergies or aversions * 3 or fewer stools per week or regular laxative use * Lipid-lowering medication usage \<6 months
Get updates
Get notified about this study
Sign up to get updates when this study changes or when new studies for Cardiovascular diseases are added.
Genom att skicka in godkänner du våra Användarvillkor
Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Virginia Polytechnic and State University
Blacksburg, Virginia, 24061, United States
More trials for these conditions
Other studies related to the condition(s) this trial covers.
- Could monthly texts and automatic risk scores stop heart attacks before they start?
- Can a nurse and a neighbor help tame chronic disease?
- Two eggs a day put to the test for heart health
- A soft patch that watches your heart beat in real time
- Can a Once-Daily form of tacrolimus spare liver transplant patients from side effects?
- Inhaled drug aims to ease dangerous lung blood pressure in scarred lungs