Fiber fix for asthma? new study tests gut health link
NCT ID NCT06372249
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether adding soluble fiber (inulin) to the diet can improve asthma control in children aged 6 to 17. Participants will take a fiber or placebo drink for several weeks. Researchers will check asthma symptoms and analyze gut and nasal microbes to see if diet changes can help manage the disease.
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
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 105 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Nov 2025
- Expected to finish
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May 2027
An estimate. End dates often move.
- Lead sponsor
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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
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6 to 17 years
- Sex
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Anyone
- Healthy volunteers
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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 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: * Between ages 6-17 * Asthma diagnosis within the last 2 years * Fractional excretion of exhaled nitric oxide (FeNO) \> 50 ppb OR a clinical history of environmental allergies as defined by a positive skin prick or positive specific immunoglobulin E (IgE) tests to aeroallergens * No emergency department visits in the past 1 month * Ability to consume a liquid drink of fiber or placebo * Ability to return for a 4-6 week follow-up visit * No special or unique diet Exclusion Criteria: * Cystic fibrosis * Bronchiectasis * Change in asthma medicines other than short acting bronchodilators planned over the next 4-6 weeks * Baseline estimated daily fiber intake less than or equal to 16 grams as determined by the ASA 24 * Sibling of a participant already enrolled in the study
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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.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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Phoenix Children's
RECRUITINGPhoenix, Arizona, 85016, United States
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