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ClinicalTrials.gov public records Last synced Oct 7, 2026, 10:50 AM EDT

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Showing 73–96 of 157 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Lactobacillus acidophilus probiotic Clear all
Completed Phase 2 Interventional Accepts healthy volunteers

The Effects of Probiotic Supplementation on Markers of Muscle Damage and Performance Following Exercise Induced Muscle Damage

NCT02520583
View directory record Official record
Conditions
Probiotics
Interventions
Lactic acid bacteria and bifidobacteria, Placebo
Dietary Supplement · Other
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Oct 19, 2016 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 2 Interventional

Probiotics for Clostridium Difficile Infection in Older Adults

NCT01680874
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 3, 2015 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 3 Interventional

Lactobacillus GG in the Prophylaxis of Ventilator Associated Pneumonia

NCT00613795
View directory record Official record
Conditions
Pneumonia, Ventilator Associated Pneumonia
Interventions
Lactobacillus GG, placebo
Dietary Supplement
Lead sponsor
Creighton University
Other
Eligibility
19 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 18, 2010 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Fecal Recovery of the Probiotic Bacteria Lactobacillus Rhamnosus GG (LGG) and Bifidobacterium Animalis Subspecies Lactis BB-12 (BB-12) in Healthy Humans Following Daily Consumption of a Probiotic Supplement

NCT01757054
View directory record Official record
Conditions
Fecal Analysis
Interventions
ProNutrients Probiotic
Dietary Supplement
Lead sponsor
Pfizer
Industry
Eligibility
18 Years to 70 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 30, 2013 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional

Ritual Synbiotic+, a Dietary Supplement Designed to Impact Gastrointestinal Health, Mood, and Behavior in Women

NCT06834984
View directory record Official record
Conditions
Gastrointestinal Disease Symptoms
Interventions
Prebiotic, probiotic, postbiotic combination, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
25 Years to 65 Years · Female only
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional

Evaluation of Jarro-Dophilus EPS® Probiotic Formulations

NCT02693314
View directory record Official record
Conditions
Healthy
Interventions
Jarro-Dophilus EPS® (5 billion CFU/capsule), Jarro-Dophilus EPS® High Potency (25 billion CFU/capsule), Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 50 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 23, 2018 · Synced Oct 7, 2026, 10:50 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Alcoholic Liver Disease and the Gut Microbiome

NCT05007470
View directory record Official record
Conditions
Alcohol Use Disorder, Alcoholic Liver Disease, Microbiome
Interventions
VSL #3 112.5 Capsule, Placebo
Drug · Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 6, 2025 · Synced Oct 7, 2026, 10:50 AM EDT
Not listed Not applicable Interventional

Assess the Effects of a Limosilactobacillus Supplement on Recurrence of UTI in Healthy Women During a 6-month Period

NCT05793814
View directory record Official record
Conditions
Uncomplicated Symptomatic Urinary Tract Infections
Interventions
Limosilactobacillus reuteri 3613, Placebo
Dietary Supplement
Lead sponsor
Church & Dwight Company, Inc.
Industry
Eligibility
18 Years to 65 Years · Female only
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Mar 31, 2023 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional

Lactobacillus Reuteri in the Prevention of Antibiotic Associated-diarrhea and Clostridium Difficile

NCT02127814
View directory record Official record
Conditions
Antibiotic-associated Diarrhea, Clostridium Difficile
Interventions
Lactobacillus reuteri
Dietary Supplement
Lead sponsor
Case Western Reserve University
Other
Eligibility
18 Years and older
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 9, 2019 · Synced Oct 7, 2026, 10:50 AM EDT
Not listed Not applicable Interventional

Effects of a Multispecies Probiotic on Migraine

NCT04696458
View directory record Official record
Conditions
Migraine, Irritable Bowel Syndrome, Headache, Migraine
Interventions
Lactobacillus plantarum (CECT7484 and CECT7485)/ Pediococcus acidilactici (CECT7483), Placebo Comparator: Placebo
Dietary Supplement · Other
Lead sponsor
Scripps Health
Other
Eligibility
18 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Nov 23, 2022 · Synced Oct 7, 2026, 10:50 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Probiotics and the Gut Microbiome in Obese Hispanic Youth

NCT03115385
View directory record Official record
Conditions
Obesity, Abdominal, Adiposity
Interventions
VSL#3, Placebo
Dietary Supplement
Lead sponsor
University of Southern California
Other
Eligibility
12 Years to 18 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 14, 2017 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Probiotic Intake on Intestinal Permeability in Healthy Adults

NCT03611400
View directory record Official record
Conditions
Intestinal Barrier Function
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 50 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 21, 2019 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 1 Interventional Results available

Probiotic Use in Children Undergoing Hematopoietic Stem Cell Transplantation (HSCT)

NCT01010867
View directory record Official record
Conditions
Hematopoietic Organs; Disorder
Interventions
Lactobacillus plantarum strains 299 and 299v
Drug
Lead sponsor
Columbia University
Other
Eligibility
2 Years to 17 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
3
States / cities
Jacksonville, Florida • St. Petersburg, Florida • New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 13, 2017 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 2 Interventional Results available

Impact of Probiotics for Reducing Infections in Veterans: The IMPROVE Study

NCT01321606
View directory record Official record
Conditions
Anti-biotic Resistance
Interventions
Lactobacillus rhamnosus HN001, sugar pill (placebo)
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
113 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 3, 2018 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Probiotics in Pre-diabetic Adolescents

NCT03109587
View directory record Official record
Conditions
Obesity, Childhood
Interventions
Vivomixx, Placebo
Dietary Supplement
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
13 Years to 19 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 21, 2020 · Synced Oct 7, 2026, 10:50 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 7, 2026 · Synced Oct 7, 2026, 10:50 AM EDT
Suspended Phase 3 Interventional

BIO-K+ CL1285 for Prevention of Recurrent Clostridium Difficile Infection

NCT01202630
View directory record Official record
Conditions
Recurrent Clostridium Difficile Infection
Interventions
Lactobacillus acidophilus CL1285® and Lactobacillus casei, Placebo
Dietary Supplement
Lead sponsor
Bio-K Plus International Inc.
Industry
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
New Hyde Park, New York
Source: ClinicalTrials.gov public record
Updated Jan 15, 2016 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of a Prebiotic and Probiotic Supplement to Provide Relief From Symptoms Associated With Bacterial Vaginosis and Yeast Infections.

NCT06665126
View directory record Official record
Conditions
Bacterial Vaginosis, Yeast Infection
Interventions
Prebiotic + Probiotic Supplement, Active Placebo Supplement, Excipient Placebo Supplement
Dietary Supplement
Lead sponsor
Happy V
Industry
Eligibility
25 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Probiotics and Health-related Quality of Life in Individuals With Seasonal Allergies

NCT02349711
View directory record Official record
Conditions
Healthy
Interventions
Probiotic mixture, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 60 Years
Enrollment
224 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 9, 2017 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 1 Interventional Results available

Biological Signatures, Probiotic Among Those With mTBI and PTSD

NCT02723344
View directory record Official record
Conditions
Mild Traumatic Brain Injury, Post Traumatic Stress Disorder
Interventions
of Lactobacillus reuteri (L. reuteri; DSM 17938), Sunflower and medium chain triglyceride oils
Dietary Supplement · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 50 Years
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Oct 7, 2026, 10:50 AM EDT
Withdrawn Phase 2 Interventional

Probiotics for Girls With Recurring Urinary Tract Infections

NCT00789464
View directory record Official record
Conditions
Recurrent Urinary Tract Infection
Interventions
Lactobacillus reuteri DSM 17938, trimethoprim/sulfamethoxazole
Dietary Supplement · Drug
Lead sponsor
Baylor College of Medicine
Other
Eligibility
3 Months to 17 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Exercise, Milk Thistle, and Lactobacillus to Influence Plasma Bilirubin

NCT04717726
View directory record Official record
Conditions
Obesity
Interventions
Milk Thistle (MT), Lactobacillus Gasseri (LAC), Exercise (EX), Control (CON)
Dietary Supplement · Behavioral
Lead sponsor
Kyle Flack
Other
Eligibility
18 Years to 50 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 28, 2023 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Probiotics on Health-related Quality of Life in College Students With Upper Respiratory Infections

NCT01657643
View directory record Official record
Conditions
Upper Respiratory Infection
Interventions
Probiotics, placebo
Dietary Supplement
Lead sponsor
University of Medicine and Dentistry of New Jersey
Other
Eligibility
18 Years to 25 Years
Enrollment
231 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Framingham, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 28, 2015 · Synced Oct 7, 2026, 10:50 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

The PRIDE Study Probiotics on Regulation and Improving Digestive hEalth

NCT01203462
View directory record Official record
Conditions
Digestive Irregularity, Digestive Discomfort, History of Straining During Bowel Movements, History of Hard or Lumpy Stools
Interventions
Probiotic strain of Bifidobacterium, No Bifidobacterium
Other
Lead sponsor
Georgetown University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Feb 11, 2013 · Synced Oct 7, 2026, 10:50 AM EDT