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Could a Fiber-Rich diet beat constipation without pills?

NCT ID NCT07388589

Symptom relief Sponsor: Singapore Institute of Technology 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 This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests a diet rich in soluble fiber and natural osmotic sugars (the SOLOS diet) to see if it improves constipation symptoms in adults with functional bowel disorders like IBS-C. Researchers will track stool frequency, form, and symptom severity in 180 participants. The goal is to find a simple, effective dietary approach that could replace or reduce the need for medication.

What this could mean

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

Active substance
dietary advice combining soluble fibre and osmotic carbohydrates (SOLOS diet)
What this could lead to
If it works, this diet could offer a simple, drug-free way to improve bowel symptoms and quality of life for people with chronic constipation.
What could go wrong
This trial hasn't started yet, and diet studies can be hard to follow consistently. Results may vary from person to person.

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.

Participants

About 180 people

The number the study aims to enrol. It can still change while the study runs.

Expected to start

Feb 2026

An estimate. Start dates often move.

Expected to finish

Mar 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.

Who is studied

Adult patients (18-70 years old) with functional bowel disorders with constipation from the UK, seen by a specialist dietitian (Principal Investigator)

Ages

18 to 70 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: * Presented with symptoms of FC, IBS-C, or SIBO-C * Were aged 18 to 70 years old. (Research focus is on adult patients, excluding older adults and children) * Date of baseline (first) and follow-up appointments ranged from January 2021 to December 2025 * Did not attend follow-up appointments (Data would be treated as "intention to treat" and data points were carried forward for conservative analysis). Exclusion Criteria: * Had no history of constipation-related symptoms (Does not relate to research question's population or outcome) * Started treatment before January 2021 * Were not due for follow-up before the end of December 2025 * Symptom and stool data inadequately recorded

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Conditions

The condition(s) this trial relates to.

constipation disorder irritable bowel syndrome small intestinal bacterial overgrowth

As listed by the trial registrant

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

Constipation Constipation - functional Constipation chronic idiopathic Constipation, signs and symptoms, digestive Constipation-predominant IBS (IBS-C) Constipation-predominant irritable bowel syndrome Constipation-predominant irritable bowel syndrome (IBS-C) Diet modification Diet therapy Diet, food and nutrition Dietary and nutritional therapies Dietary fiber Dietary fibers

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Singapore Institute of Technology

    Singapore, Singapore, 828608, Singapore

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