Could a probiotic ease autism symptoms? new trial investigates
NCT ID NCT06677840
First seen Jun 27, 2026 · Last updated Jul 10, 2026 · Updated 2 times
Summary
This study tests whether a probiotic called Clostridium butyricum GKB7 can help children with autism. About 90 kids aged 4 to 15 will take either the probiotic or a placebo for a period. Researchers will also look for biomarkers in the gut and blood to better understand the gut-brain connection and improve diagnosis.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- probiotic (Clostridium butyricum GKB7)
- What this could lead to
- If it works, this could point toward a new treatment option for some autism symptoms and help doctors diagnose autism earlier using biomarkers.
- What could go wrong
- This is an early-stage study with only 90 children, so results may not apply to everyone. The probiotic may not work better than a placebo, and side effects are possible.
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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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
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About 110 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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May 2024
- Expected to finish
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Apr 2028
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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4 to 15 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: * Children and adolescents aged 4 to 15 who are clinically diagnosed with ASD according to DSM-5 criteria and confirmed by the ADI-R/ADOS. * Caregivers cooperate with all the assessments and stool and blood collection. Exclusion Criteria: * A history of major psychiatric disorders (e.g., schizophrenia, bipolar disorder, major depression), neurological disorders, and substances use disorders. * Difficulty following instructions. * Consumption of antibiotics and yogurt or probiotic products two weeks prior to enrollment.
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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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National Taiwan University Hospital
RECRUITINGTaipei, Taiwan
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Other studies related to the condition(s) this trial covers.
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