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Showing 1–19 of 19 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Orally-administered probiotic Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Study to Investigate the Potential of Probiotics in Yogurt

NCT00492583
View directory record Official record
Conditions
Healthy
Interventions
Bifidobacterium lactis (BB-12), Placebo
Drug
Lead sponsor
Georgetown University
Other
Eligibility
1 Year to 3 Years
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 16, 2011 · Synced Sep 25, 2026, 5:22 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Response to Long-Haul Travel in Elite Football Players

NCT07585474
View directory record Official record
Conditions
Microbial Composition, Immune Function
Interventions
Probiotic Capsule, Placebo
Drug
Lead sponsor
Sheffield Hallam University
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Phase 3 Interventional Results available

A Probiotic Intervention to Prevent Relapse Following Hospitalization for Mania

NCT03383874
View directory record Official record
Conditions
Mania (Neurotic)
Interventions
Probio-Tec BG-VCap-6.5, Placebo
Combination Product · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 25, 2026, 5:22 PM EDT
Not listed Phase 1 Interventional

Bacteriuria Eradication Through Probiotics

NCT00717600
View directory record Official record
Conditions
Bacteriuria
Interventions
Lactobacillus reuteri RC-14 and Lactobacillus rhamnosus GR-1
Dietary Supplement
Lead sponsor
Baylor College of Medicine
Other
Eligibility
Up to 18 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2008 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Not applicable Interventional

The Effects of an Orally-Administered Probiotic on Vaginal Symptoms

NCT07829861
View directory record Official record
Conditions
Vaginal Odor
Interventions
Orally-administered probiotic, Placebo
Dietary Supplement
Lead sponsor
Bonafide Health
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Harrison, New York
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 5:22 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Impact of Probiotics on Drug, Vitamin, and Hormone Metabolism

NCT04281407
View directory record Official record
Conditions
Metabolism
Interventions
Visbiome
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Feb 23, 2020 · Synced Sep 25, 2026, 5:22 PM 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 25, 2026, 5:22 PM EDT
Completed Phase 1Phase 2 Interventional

Does Weight Loss Surgery and Probiotic Supplementation Lead to a "Lean" Gut Microbiota?

NCT01870544
View directory record Official record
Conditions
Obesity
Interventions
Lactobacillus Rhamnosus GG, Placebo
Dietary Supplement
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 9, 2016 · Synced Sep 25, 2026, 5:22 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

The Effect of a Multi-strain Probiotic on Acclimatization to High Altitude

NCT06552806
View directory record Official record
Conditions
Probiotics
Interventions
SLAB51
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
2
States / cities
Bishop, California • La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 13, 2024 · Synced Sep 25, 2026, 5:22 PM EDT
Terminated Phase 1 Interventional

Probiotic Lactobacillus GG to Eliminate VRE Colonization

NCT00756262
View directory record Official record
Conditions
Vancomycin Resistant Enterococcal Colonization
Interventions
Lactobacillus GG or Culturelle
Biological
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 4, 2024 · Synced Sep 25, 2026, 5:22 PM 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 25, 2026, 5:22 PM EDT
Not yet recruiting Phase 4 Interventional

Impact of Probiotics on Gut Microbiome During Antibiotic Prophylaxis in Elective Orthopedic Surgery

NCT06791993
View directory record Official record
Conditions
Dysbiosis, Gut -microbiota, Microbiome Analysis, Probiotic, Antibiotic Prophylaxis
Interventions
Placebo Capsule, Probiotic with Human Milk Oligosaccharides (HMO)
Drug · Dietary Supplement
Lead sponsor
Acibadem Maslak Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Not applicable Interventional Results available

Effect of Milk Oligosaccharides and Bifidobacteria on the Intestinal Microflora of Children With Autism

NCT02086110
View directory record Official record
Conditions
Autism
Interventions
Synbiotic, Prebiotic
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
2 Years to 11 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 31, 2019 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Open Label Trial of Nissle 1917

NCT02276508
View directory record Official record
Conditions
Urinary Tract Infections
Interventions
E. coli Nissle 1917
Drug
Lead sponsor
Elizabeth Lucas
Other
Eligibility
21 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 17, 2015 · Synced Sep 25, 2026, 5:22 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

The Gut - PRO Study

NCT07413744
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Probiotic, Placebo
Drug · Other
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
60 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 25, 2026, 5:22 PM EDT
Withdrawn Phase 2 Interventional

Growth Hormone and Exclusion Diet Therapy in Juvenile Crohn's Disease

NCT01647412
View directory record Official record
Conditions
Crohn's Disease
Interventions
Growth Hormone, Nutraceutical Combination, Exclusion Diet, Placebo Growth Hormone
Drug · Dietary Supplement · Other
Lead sponsor
Columbia University
Other
Eligibility
10 Years to 17 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2012
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 12, 2015 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Quasi Experiment of Prenatal Probiotics Against Group B Streptococcus Colonization

NCT02249325
View directory record Official record
Conditions
Pregnancy
Interventions
Probiotic dietary supplement
Dietary Supplement
Lead sponsor
Marquette University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 6, 2014 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Phase 4 Interventional

Probiotics to Prevent Severe Pneumonia and Endotracheal Colonization Trial

NCT02462590
View directory record Official record
Conditions
Ventilator Associated Pneumonia, Infections, C-Difficile, Antibiotic-associated Diarrhea, Diarrhea
Interventions
L. rhamnosus GG - Probiotic, Placebo - Microcrystalline Cellulose
Drug
Lead sponsor
McMaster University
Other
Eligibility
18 Years and older
Enrollment
2,650 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
2
States / cities
Rochester, Minnesota • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Sep 25, 2026, 5:22 PM EDT
Completed Early Phase 1 Interventional

Safety, Tolerability, and Pharmacodynamics of SYNB8802v1 in Subjects With History of Gastric Bypass Surgery or Short-bowel Syndrome

NCT05377112
View directory record Official record
Conditions
Enteric Hyperoxaluria
Interventions
SYNB8802v1, Placebo
Drug · Other
Lead sponsor
Synlogic
Industry
Eligibility
18 Years to 74 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Mar 16, 2023 · Synced Sep 25, 2026, 5:22 PM EDT