Could a personalized probiotic ease autism symptoms?
NCT ID NCT04655326
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a custom probiotic blend in 296 children and adults with autism spectrum disorder. The goal was to see if the supplement could improve autism symptoms and gastrointestinal issues. Participants took a personalized mix of probiotics, prebiotics, and botanicals, and parents reported changes in behavior and gut health.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- personalized blend of probiotic strains, prebiotics, and botanicals
- What this could lead to
- If it works, this could point toward a way to ease autism-related behaviors and stomach issues using a tailored probiotic.
- What could go wrong
- This is a completed study without a control group, so results may be due to chance or the placebo effect. The intervention is a dietary supplement, not a drug, so any benefits are likely modest.
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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296 people
The number who actually took part.
- Started
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Oct 2020
- Finished
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Jul 2025
- 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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30 months to 75 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.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. New client of Sun Genomics (has applied for testing and treatment, but not yet begun treatment) 2. Diagnosis of ASD (initially based on self-report of ASD diagnosis by appropriate medical professional, and then verified by an evaluation of the Social Responsiveness Scale (SRS-2) by ASU staff. 3. Children and adults ages 2.5-75 years Exclusion Criteria: 1. Antibiotic use in the last two months (not counting topical antibiotics) 2. Any changes in medications, nutritional supplements, therapies, in the last two months, or any plans to change them during the first 3 months of probiotic treatment.
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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.
Contacts and locations
Locations
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Arizona State University
Tempe, Arizona, 85287, United States
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