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Showing 1–24 of 97 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral probiotic Clear all
Completed Phase 2 Interventional Results available

Effects of the Probiotic Visbiome Extra Strength on Gut Microbiome & Immune Activation Markers

NCT02706717
View directory record Official record
Conditions
HIV-1 Infection
Interventions
Visbiome Extra Strength, Placebo
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jan 5, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

BacterioPHAGE for Gastrointestinal Health 2 Study

NCT04511221
View directory record Official record
Conditions
Mild Gastrointestinal Symptoms in Healthy Adults
Interventions
Bifidobacterium animals subsp. lactis BL04+PreforPro, Bifidobacterium animals subsp. lactis BL04, Placebo
Dietary Supplement · Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
93 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 12, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Active, not recruiting Phase 2 Interventional

Probiotics to Prevent Relapse After Hospitalization for Bipolar Depression

NCT03349528
View directory record Official record
Conditions
Bipolar Depression
Interventions
Probiotic Supplement, Inert Compound
Biological
Lead sponsor
Sheppard Pratt Health System
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
1
States / cities
Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Recruiting Early Phase 1 Interventional

Oral 5 Strain Probiotic for GI Toxicity Mitigation During Pelvic Radiation

NCT07231588
View directory record Official record
Conditions
Radiation Injuries
Interventions
Pendulum Glucose Control (PGC)
Biological
Lead sponsor
University of Cincinnati
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Daily Supplementation of Lactobacillus Acidophilus MPH734, for One Week, Affect Acute (Immediate), Subacute (7 Days), and Post-treatment Discontinuation Lactose Metabolism, Gastrointestinal Symptoms, and Clinical Markers of Inflammation and Safety Compared to a Placebo

NCT04531033
View directory record Official record
Conditions
Lactose Intolerance
Interventions
Lactobacillus acidophilus MPH734, Placebo
Dietary Supplement
Lead sponsor
Lemuel W. Taylor IV
Other
Eligibility
18 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Belton, Texas
Source: ClinicalTrials.gov public record
Updated May 15, 2024 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Probiotic Water on Oral Health in Adults

NCT04473404
View directory record Official record
Conditions
Oral Bacteria, Halitosis
Interventions
Streptococcus salivarius DB-B5 - 2 billion CFU/day, Streptococcus salivarius DB-B5 - 10 billion CFU/day, Placebo
Dietary Supplement · Other
Lead sponsor
Dose Biosystems Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 3, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prebiotic and Probiotic Modulation of the Gut Microbiota-gut-brain Axis During Acute Stress

NCT05392556
View directory record Official record
Conditions
Stress Physiology
Interventions
Probiotic, Prebiotic, Placebo
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Sep 2, 2026, 10:57 AM EDT
Withdrawn Not applicable Interventional

Probiotic Use in Patients With Prior COPD Exacerbation

NCT02185092
View directory record Official record
Conditions
COPD, Obstructive Lung Disease
Interventions
Lactobacillus GG, Sugar pill
Dietary Supplement · Other
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 99 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated May 22, 2017 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Safety of BB-12 Supplemented Strawberry Yogurt For Healthy Children

NCT01652287
View directory record Official record
Conditions
Children
Interventions
BB-12 supplemented strawberry yogurt, Strawberry flavored yogurt
Drug · Other
Lead sponsor
Georgetown University
Other
Eligibility
1 Year to 5 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Mar 21, 2024 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of BB-12 Supplemented Strawberry Yogurt For Healthy Adults on Antibiotics

NCT00848003
View directory record Official record
Conditions
Adults on Antibiotics
Interventions
Bifidobacterium animalis subsp. lactis strain BB-12, Placebo
Drug
Lead sponsor
Georgetown University
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated May 19, 2013 · Synced Sep 2, 2026, 10:57 AM EDT
Recruiting Not applicable Interventional

Probiotics in Adults With Rheumatoid Arthritis

NCT07304505
View directory record Official record
Conditions
Rheumatoid Arthritis (RA)
Interventions
Align Extra Strength Probiotic Supplement
Dietary Supplement
Lead sponsor
Ancilia Biosciences
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 30, 2025 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Results available

Double-Blind Trial of a Probiotic Supplement to Reduce the Symptoms of Schizophrenia

NCT01242371
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Probiotic Supplement, Identical-appearing Placebo
Dietary Supplement
Lead sponsor
Sheppard Pratt Health System
Other
Eligibility
18 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Towson, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 4, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Terminated Phase 2 Interventional Results available

Effect of VSL#3 on Bone Mineral Density in Postmenopausal Women

NCT03165747
View directory record Official record
Conditions
Menopausal Osteoporosis
Interventions
VSL#3, Placebo
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
50 Years to 65 Years · Female only
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 4 Interventional Results available

Effect of Probiotic Supplementation on Endothelial Function

NCT01952834
View directory record Official record
Conditions
Coronary Artery Disease
Interventions
GoodBelly Probiotic, Vancomycin
Dietary Supplement · Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
40 Years to 75 Years · Male only
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Milwauke, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 20, 2016 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Correlating Probiotic Dietary Supplements During Pregnancy With Maternal Microbiome Profiles

NCT03611647
View directory record Official record
Conditions
Pregnancy Related
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
3
States / cities
La Jolla, California • San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2019 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional

Optimizing Overactive Bladder Treatment

NCT03904407
View directory record Official record
Conditions
Overactive Bladder
Interventions
Lactobacillus Probiotic Capsule, Matching Lactobacillus Probiotic Placebo Capsule
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
2
States / cities
Hillsborough, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated May 10, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Mechanisms of Preventing Antibiotic-Associated Diarrhea and the Role for Probiotics

NCT03755765
View directory record Official record
Conditions
Antibiotic-associated Diarrhea
Interventions
Amoxicillin-Clavulanate 875 Mg-125 Mg Oral Tablet, BB-12, Control
Drug · Biological · Other
Lead sponsor
Georgetown University
Other
Eligibility
18 Years to 65 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Probiotic for Oral Health (PRO Health) Study

NCT03748017
View directory record Official record
Conditions
Oral Microbiome
Interventions
Placebo-Control Supplement, Streptococcus-Containing Probiotic Supplement
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
21 Years to 45 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1 Interventional

Probiotics and Oxytocin Nasal Spray on Social Behaviors of Autism Spectrum Disorder (ASD) Children

NCT03337035
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
intranasal oxytocin, oral probiotics, oral placebo
Drug · Dietary Supplement
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
3 Years to 25 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Charlestown, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 3, 2020 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Pinpoint Trial: Prebiotics IN Peanut Oral ImmunoTherapy

NCT05138757
View directory record Official record
Conditions
Peanut Allergy
Interventions
Prebiotic, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
4 Years to 17 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
2
States / cities
Chicago, Illinois • Hyde Park, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Impact of Lactobacillus Rhamnosus GG on Proton Pump Inhibitor-Induced Gut Dysbiosis

NCT05517928
View directory record Official record
Conditions
Healthy
Interventions
Omeprazole, Lactobacillus rhamnosus GG, Placebo
Drug · Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Sep 2, 2026, 10:57 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

The Effects of Probiotics in Atopic Dermatitis

NCT00378300
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Oral Probiotics
Drug
Lead sponsor
University of California, Los Angeles
Other
Eligibility
6 Months to 3 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 15, 2016 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Phase 2 Interventional Results available

Probiotic Prophylaxis of Hirschprung's Disease Associated Enterocolitis (HAEC)

NCT00630838
View directory record Official record
Conditions
Hirschsprung Disease
Interventions
VSL#3, Placebo
Drug
Lead sponsor
University of Michigan
Other
Eligibility
1 Month to 12 Months
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
2
States / cities
Ann Arbor, Michigan • Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 18, 2016 · Synced Sep 2, 2026, 10:57 AM EDT
Completed Early Phase 1 Interventional

Impact of Probiotics on Oral Microbiota in Older Adults With Dysphagia

NCT03682094
View directory record Official record
Conditions
Dysphagia
Interventions
VSL#3
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
65 Years to 99 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 15, 2024 · Synced Sep 2, 2026, 10:57 AM EDT