Effects of probiotics on children with autism

Effects of Probiotic Consumption in Children with Autism Spectrum Disorder (ASD) in the Metropolitan District of Quito, Ecuador

Phase 2 Interventional Universidad San Francisco de Quito · NCT06568588

This study is testing if a probiotic called Saccharomyces boulardii can help improve gut health and behavior in Ecuadorian children with autism and digestive issues.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment66 (estimated)
Ages5 Years to 12 Years
SexAll
SponsorUniversidad San Francisco de Quito Academic / other
Locations1 site (Quito, Pichincha)
Trial IDNCT06568588 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the impact of the probiotic Saccharomyces boulardii on Ecuadorian children diagnosed with autism spectrum disorder (ASD) and gastrointestinal symptoms. The study employs a randomized crossover design, where participants will alternate between taking the probiotic and a control period without it over eight months. Researchers will assess changes in digestive symptoms, immune function, nutritional status, and behavior through various biological samples and regular follow-ups by a medical team. The goal is to determine if probiotic supplementation can improve gut health and related outcomes in children with ASD.

Who should consider this trial

Good fit: Ideal candidates are children aged 5 to 12 years with a diagnosis of autism spectrum disorder and a history of gastrointestinal disorders.

Not a fit: Patients with severe chronic comorbidities or recent use of certain medications may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved gastrointestinal health and behavioral outcomes for children with autism spectrum disorder.

How similar studies have performed: While few studies have explored probiotics in children with ASD, existing research suggests potential benefits, making this approach both novel and promising.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Diagnostic of Autistic Spectrum Disorders (ASD).
* History of gastrointestinal (GI) disorders, recurrent diarrhea, during the past 6 months.
* Children attending learning or therapy centers or schools.
* Age between 5 and 12 years of age.
* Children whose parents or guardians consent their participation in the study.
* Children who can provide the required biological samples, and their guardians must provide the necessary information to complete the established instruments.
* The parents or guardians of the children must sign the informed consent form in order to be part of the study.

Exclusion Criteria:

* Use of antibiotics, systemic steroids or antifungal medication during the last 15 days prior to fecal sample collection.
* Acute gastrointestinal, respiratory or febrile processes.
* Severe chronic comorbidities such as cancer, immunosuppression, obstructive respiratory disorders, Crohn's disease, ulcerative colitis, among others, at the discretion of the investigators.
* Probiotics consumption in the last three months prior to study enrollment.
* History of allergy or hypersensitivity to Saccharomyces boulardii or its components, or allergy to yeasts.
* Contraindication and special warning to Saccharomyces boulardii according to the technical Data Sheets, including central venous catheter carriers.
* Simultaneous participation in clinical studies, or in exclusion periods of a previous clinical study.

Where this trial is running

Quito, Pichincha

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Autism Spectrum Disorderintestinal microbiotaIntestinal metabolomeAutism spectrum disorderASDNutritionImmune statusGastrointestinal symptoms
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.