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ClinicalTrials.gov public records Last synced Sep 6, 2026, 1:25 AM EDT

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Showing 1–24 of 165 matching trials from the live ClinicalTrials.gov search.
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Conditions
Healthy
Interventions
Probiotic: Bacillus subtilis, Lactobacillus plantarum, Bifidobacterium animalis, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
35 Years to 65 Years
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Gainesville, Florida
Completed Not applicable Interventional Accepts healthy volunteers

Use of Probiotics to Aid in Weight Loss

NCT01445704
Conditions
Weight Loss
Interventions
Probiotics, Placebo
Dietary Supplement
Lead sponsor
Prisma Health-Upstate
Other
Eligibility
18 Years and older
Enrollment
151 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Greenville, South Carolina
Conditions
IBS-D and Functional Dyspepsia
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
Sprim Advanced Life Sciences
Other
Eligibility
18 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
2
States / cities
Duluth, Georgia • Norfolk, Virginia
Recruiting Not applicable Interventional Accepts healthy volunteers

Probiotic Intervention Study

NCT06030362
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
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

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

NCT07585474
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
Conditions
Oral Health
Interventions
ProBiora3 mints, Placebo tablet
Other
Lead sponsor
Oragenics, Inc.
Industry
Eligibility
18 Years to 35 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2012
U.S. locations
1
States / cities
Seattle, Washington
Completed Phase 1Phase 2 Interventional Results available

Use of Oral Probiotics to Reduce Urinary Oxalate Excretion

NCT00587041
Conditions
Nephrolithiasis, Hyperoxaluria, Crohn's Disease
Interventions
Oxadrop, Agri-King Synbiotic (AKSB), Placebo
Dietary Supplement · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Rochester, Minnesota
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

LpD3.5 Intervention Study in Older Adults- LISA-I Trial

NCT07794956
Conditions
Mild Cognitive Impairment (MCI), Cognition, Brain Aging, Microbiome Dysbiosis, Leaky Gut Syndrome, Gut Inflammation, Inflammaging
Interventions
LpD3.5, Placebo
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
60 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Conditions
Type 1 Diabetes, type1diabetes, Type 1 Diabetes Mellitus
Interventions
Lactiplantibacillus plantarum, Placebo
Dietary Supplement · Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
3 Years to 45 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Milwaukee, Wisconsin
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
Conditions
Depression
Interventions
Visbiome, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
15 Years to 24 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Francisco, California
Terminated Phase 1Phase 2 Interventional Results available

"CHANGE COVID-19 Severity"

NCT04941703
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
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
Conditions
HSIL, High Grade Squamous Intraepithelial Lesion, HPV-Related Squamous Cell Carcinoma, Anal HSIL
Interventions
EXE-346 Probiotic, Placebo, Usual Care High Resolution Anoscopy (HRA)
Drug · Procedure
Lead sponsor
University of California, San Francisco
Other
Eligibility
21 Years and older
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
San Francisco, California
Conditions
Immune Function
Interventions
Yogurt drink, Acidified lactic beverage
Dietary Supplement
Lead sponsor
Meiji Co., Ltd.
Industry
Eligibility
18 Years to 65 Years
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Conditions
Infantile Colic
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
The Archer-Daniels-Midland Company
Industry
Eligibility
3 Weeks to 12 Weeks
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Conditions
Pre-diabetic
Interventions
Sugar Pill, XOS 2.8
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Conditions
Diarrhea
Interventions
Probiotics
Dietary Supplement
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 89 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
New Brunswick, New Jersey
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility of an Oral Intervention for Sexual Health in Transgender Men

NCT06470906
Conditions
Vaginal Dysbiosis, Vaginal Disease, Molecular-bacterial Vaginosis
Interventions
Probiotic Group, Placebo Group
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Brooklyn, New York
Completed Not applicable Interventional Accepts healthy volunteers

Probiotics and Multi-Drug Resistant Urinary Tract Infection

NCT03644966
Conditions
Urinary Tract Infections, Recurrent UTI, Antibiotic Resistant Infection
Interventions
Bifidobacterium infantis, Placebo, Antibiotics
Dietary Supplement · Other · Drug
Lead sponsor
Ochsner Health System
Other
Eligibility
18 Years to 90 Years · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Jefferson, Louisiana
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
Conditions
Gastrointestinal Neoplasms
Interventions
LGG, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Conditions
Influenza
Interventions
Bifidobacterium lactis HN019, Placebo
Dietary Supplement
Lead sponsor
Fonterra Research Centre
Industry
Eligibility
18 Years to 60 Years
Enrollment
426 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
2
States / cities
Coral Gables, Florida • Rochester, Michigan
Completed Phase 1Phase 2 Interventional Results available

Pinpoint Trial: Prebiotics IN Peanut Oral ImmunoTherapy

NCT05138757
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