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Can beans beat obesity and colon cancer?

NCT ID NCT04780477

Prevention Sponsor: Emory University 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 This study
Running, but no longer taking on new participants.
Completed
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 20, 2026 · Last updated Aug 21, 2026 · Updated 1 time

Summary

This study tests whether a high-fiber diet centered on legumes like dry beans can help overweight or obese adults who have had colon polyps lose weight and reduce their risk of colon cancer. Participants follow a diet with pre-portioned meals for up to a year, with nutritionist support. Researchers measure changes in body weight and a colon tissue biomarker linked to cancer risk.

What this could mean

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

Active substance
A high-fiber diet featuring legumes (dry beans) with pre-portioned meals and nutritionist guidance.
What this could lead to
If successful, this diet could offer a practical, non-drug way to help overweight adults lose weight and potentially lower their risk of colon cancer.
What could go wrong
This is a small, early-stage trial, and results may not apply to everyone. The diet requires significant commitment, and weight loss or biomarker changes may not translate into reduced cancer risk.

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

60 people

The number who actually took part.

Started

Jun 2021

Expected to finish

Jun 2027

An estimate. End dates often move.

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 75 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

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: * free-living adults 40 to 75 years old * BMI 25-40 kg/m\^2 * able to provide documentation confirming a colonoscopy within 3 years that found ≥1 adenoma \>0.5 cm or a sessile serrated polyp (any) * English speaking * ambulatory, able to pick up food, participate in clinical exams and laboratory tests * able to provide informed consent Exclusion Criteria: * serious and/or unstable medical condition as deemed by study physician * history of colorectal cancer, bowel resection, polyposis syndrome, or inflammatory bowel disease * smoked regularly in the past year * dietary restrictions substantially limiting compliance (e.g., must be willing to be randomized to either diet) * planning on substantially changing usual exercise behavior in the next 6 months * regular or recent use of prescription medication that may alter inflammation markers or gut function as deemed by study physician * pregnant women, breast feeding women, or women planning pregnancy within the year of active study participation

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Conditions

The condition(s) this trial relates to.

colonic neoplasm colorectal adenoma Obesity obesity disorder Weight Loss colon carcinoma prevention target colorectal cancer prevention target

As listed by the trial registrant

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

Colon cancer Obesity

Contacts and locations

Locations

  • Rollins School of Public Health, Emory University

    Atlanta, Georgia, 30322, United States

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