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Showing 1–24 of 199 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Probiotic dietary supplement Clear all
Completed Not applicable Interventional Results available

Probiotics and Antibiotic Associated Diarrhea in Pediatric Complicated Appendicitis

NCT04529980
View directory record Official record
Conditions
Appendicitis, Appendicitis; Perforation
Interventions
Lactobacillus rhamnosus GG (LGG) Probiotic, Placebo
Dietary Supplement
Lead sponsor
Children's Health
Other
Eligibility
4 Years to 18 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2024 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of a Probiotic Strain on Ibuprofen-induced GI Damage

NCT04447924
View directory record Official record
Conditions
Reduction of Small Intestinal Ulceration Risk
Interventions
Bif195, Placebo
Dietary Supplement · Other
Lead sponsor
Chr Hansen
Industry
Eligibility
18 Years to 40 Years
Enrollment
177 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 25, 2021 · Synced Sep 4, 2026, 5:12 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Diabetic Cardiomyopathy and Heart Failure

NCT05571865
View directory record Official record
Conditions
Diabetic Cardiomyopathies, Heart Failure
Interventions
Probiotic
Dietary Supplement
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Jan 30, 2025 · Synced Sep 4, 2026, 5:12 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 2, 2015 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of a Fiber Supplement on Gut Health

NCT07755735
View directory record Official record
Conditions
Gut Health, Bloating, Irregular Bowel Movements, Gastrointestinal Symptoms
Interventions
Active Supplement, Placebo Comparator
Dietary Supplement
Lead sponsor
Belli Welli Inc.
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 4, 2026, 5:12 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Clinical Study to Assess the Effects of Prebiotic and Probiotic Supplement

NCT06794619
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Dietary Supplement with actives
Dietary Supplement
Lead sponsor
Olly, PBC
Industry
Eligibility
18 Years to 50 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced Sep 4, 2026, 5:12 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 4, 2026, 5:12 AM 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 4, 2026, 5:12 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 17, 2020 · Synced Sep 4, 2026, 5:12 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Probiotic Intervention Study

NCT06030362
View directory record Official record
Conditions
Obesity, Food Addiction
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Study to Determine the Effect of Synbiotics in Patients With Pre-diabetes

NCT04428606
View directory record Official record
Conditions
PreDiabetes
Interventions
Metabolic Rheostat, Butyrate Ultra, Placebo
Dietary Supplement
Lead sponsor
Zhaoping Li
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 15, 2022 · Synced Sep 4, 2026, 5:12 AM EDT
Recruiting Not applicable Interventional

A Study of a Plant-Based Diet and Dietary Supplements in People With Smoldering Multiple Myeloma (SMM) or Monoclonal Gammopathy of Undetermined Significance (MGUS)

NCT06055894
View directory record Official record
Conditions
Multiple Myeloma, Smoldering, Multiple Myeloma, Monoclonal Gammopathy of Undetermined Significance
Interventions
Omega-3, Curcumin, Probiotic, Whole food, plant-based diet (WFPBD)
Dietary Supplement · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated Nov 12, 2025 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Probiotics Effect on the Female Urinary Microbiome ProFUM Trial (Probiotics Effect on the Female Urinary Microbiome)

NCT03250208
View directory record Official record
Conditions
Healthy
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 31, 2019 · Synced Sep 4, 2026, 5:12 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 4, 2026, 5:12 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

"CHANGE COVID-19 Severity"

NCT04941703
View directory record Official record
Conditions
COVID-19 Infection
Interventions
Magnesium Citrate plus probiotic
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 99 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 12, 2023 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Synbiotic Supplement on Metabolic & Cognitive Outcomes Among Older Adults

NCT06845995
View directory record Official record
Conditions
Older Adults, Bioelectrical Impedance, Appetite Hormones, Metabolic Health, Body Composition Measurement, Cognitive Health
Interventions
Synbiotic supplement
Dietary Supplement
Lead sponsor
Texas Tech University
Other
Eligibility
65 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional

Impact of Probiotic Use on Immune Cell Function in Children

NCT02687503
View directory record Official record
Conditions
Respiratory Tract Infections
Interventions
Probiotic
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
12 Months to 36 Months
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 23, 2019 · Synced Sep 4, 2026, 5:12 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 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of an Oral Probiotic Intervention With or Without a Novel ADP-1 Toothpaste

NCT05330793
View directory record Official record
Conditions
Oral Health
Interventions
Oral probiotic, Placebo
Dietary Supplement
Lead sponsor
USANA Health Sciences
Industry
Eligibility
18 Years to 65 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
South Jordan, Utah
Source: ClinicalTrials.gov public record
Updated Apr 20, 2023 · Synced Sep 4, 2026, 5:12 AM EDT
Completed No phase listed Observational

Clinical Trial to Survey Results of Flourish Vaginal Care System for Recurrent Bacterial Vaginosis

NCT03734523
View directory record Official record
Conditions
Bacterial Vaginosis, Vaginal Flora Imbalance
Interventions
Flourish Vaginal Care System
Combination Product
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years to 52 Years · Female only
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Concord, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 17, 2023 · Synced Sep 4, 2026, 5:12 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of B. Adolescentis iVS-1 Probiotic on Gastrointestinal Outcomes

NCT07408518
View directory record Official record
Conditions
Digestive Disease, Gut Health
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Synbiotic Health
Industry
Eligibility
18 Years to 75 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional

Probiotic Prophylaxis for Immunosuppressant Associated Diarrhea (IAD) Following Kidney Transplantation

NCT00364650
View directory record Official record
Conditions
Immunosuppressant Associated Diarrhea
Interventions
Probiotic Supplement, Placebo
Drug · Other
Lead sponsor
Swedish Medical Center
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 25, 2011 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Effects of a Dietary Supplement on Children's Health and Development Outcomes.

NCT06704178
View directory record Official record
Conditions
Height, Cognitive Function, Weight Gain
Interventions
NuBest Tall Growth Protein Powder, Placebo Powder
Dietary Supplement
Lead sponsor
NuBest
Industry
Eligibility
10 Years to 16 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 4, 2026, 5:12 AM EDT
Completed Phase 4 Interventional Results available

Probiotics to Promote Intestinal Health

NCT02046512
View directory record Official record
Conditions
Communicable Diseases, Infection, Anti-Infective Agents, Therapeutic Uses, Pharmacologic Actions
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Sep 4, 2026, 5:12 AM EDT