Could a personalized probiotic ease autism symptoms?

NCT ID NCT04655326

Completed Symptom relief Sponsor: Arizona State University Source: ClinicalTrials.gov ↗

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.

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Conditions

The condition(s) this trial relates to.

autism spectrum disorder

As listed by the trial registrant

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

AUTISM SPECTRUM DISORDER

Contacts and locations

Locations

Arizona State University

Tempe, Arizona, 85287, United States

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