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Plant-Based diet shows promise for prediabetes in tiny study

NCT ID NCT06571279

Prevention Sponsor: Jean L. Fry Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This completed study tested whether switching from a Western diet to a plant-based diet for 5 weeks could improve insulin sensitivity in 9 adults with prediabetes. Participants received all meals and snacks, and researchers measured changes in insulin sensitivity and muscle inositol levels. The goal is to see if diet alone can help prevent type 2 diabetes.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Plant-based diet
What this could lead to
If it works, this could point toward a simple dietary approach to prevent type 2 diabetes in people with prediabetes.
What could go wrong
This is a very small, early study with only 9 participants and no control group, so results may not apply widely. The diet is short-term and tightly controlled, so real-world adherence could be 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

9 people

The number who actually took part.

Started

Oct 2024

Finished

Nov 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

30 to 55 years

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show 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: * Body mass index greater than or equal to 27 * High waist circumference (women greater than or equal to 35"; men greater than or equal to 40") * Prediabetes (based on fasting glucose 100-125 mg/dL, HbA1c 5.7-6.4, or 2-hr post-oral glucose tolerance test glucose screen between 140-199mg/dL) * Physical activity below national guidelines * Aged 30-55 (premenopausal for women) * Following a Western diet Exclusion Criteria: * Diabetes diagnosis * Take medications that may affect insulin sensitivity * More than 5% weight change within 6 months of screening * History of bariatric surgery * Report any dietary supplement, medication, or medical condition known to significantly affect weight or metabolism * Take hormone replacement therapy * Consume 3 or more servings of combined fruit and vegetables daily and/or 3 or more servings of whole grains daily * Any food allergy more severe than grade 1 on the CoFAR Grading Scale for Systemic Allergic Reactions, Version 3.0 or allergy to lidocaine

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Conditions

The condition(s) this trial relates to.

glucose intolerance Insulin Resistance prediabetes syndrome diabetes mellitus prevention target

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Prediabetes (insulin resistance, impaired glucose tolerance)

Contacts and locations

Locations

  • University of Kentucky CCTS

    Lexington, Kentucky, 40536, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.