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Gut check: does a common fiber really boost your microbiome?

NCT ID NCT07231003

Knowledge-focused Sponsor: Taipei Medical 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at whether taking glucomannan powder, a type of fiber, can improve the balance of bacteria in the gut. Researchers will give the powder or a placebo to 30 healthy adults aged 20 to 65 for 6 weeks. They will measure changes in gut bacteria and blood markers like cholesterol and blood sugar to see if the fiber has any effect.

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

About 30 people

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

Started

Aug 2025

Expected to finish

Dec 2026

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

20 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

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: \- Both genders, aged between 20 and 65 years. No history of gastrointestinal disorders or other significant health issues. Overall good health. Exclusion Criteria: \- Participants who have taken antibiotics or any medications/supplements that could affect the gut microbiota within 1 week prior to the experiment or during the study. Pregnant or breastfeeding women. Smokers or individuals with excessive alcohol consumption. Chronic disease medication usage for less than 3 months. Postmenopausal women on hormone replacement therapy. Individuals with acute illnesses such as a cold.

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Conditions

The condition(s) this trial relates to.

Dysbiosis

As listed by the trial registrant

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

Dysbiosis

Contacts and locations

Locations

  • Taipei Medical University

    Taipei, Taiwan

More trials for these conditions

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