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ClinicalTrials.gov public records Last synced Oct 18, 2026, 8:03 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 409–432 of 437 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Probiotic Clear all
Terminated Phase 3 Interventional

Probiotics and Recovery From Surgery

NCT01970683
View directory record Official record
Conditions
Major Abdominal Operation
Interventions
VSL #3 BID
Dietary Supplement
Lead sponsor
Catholic Health Initiatives
Other
Eligibility
18 Years to 99 Years
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
1
States / cities
Des Moines, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 25, 2017 · Synced Oct 18, 2026, 8:03 PM EDT
Active, not recruiting Not applicable Interventional

Impact of Lp299v on Vascular Function in Patients With PASC

NCT05227170
View directory record Official record
Conditions
COVID-19
Interventions
Lactobacillus Plantarum 299v Freeze Dried Capsule, Freeze Dried Potato Starch Capsule
Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 89 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 1, 2026 · Synced Oct 18, 2026, 8:03 PM EDT
Active, not recruiting Phase 2 Interventional

Probiotics in Newly Diagnosed T1D

NCT04141761
View directory record Official record
Conditions
Type 1 Diabetes, Type1diabetes, Type 1 Diabetes Mellitus
Interventions
Visbiome, Placebo
Dietary Supplement · Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
5 Years to 17 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2027
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 16, 2025 · Synced Oct 18, 2026, 8:03 PM EDT
Withdrawn Phase 2 Interventional

Probiotics in Girls With Spina Bifida

NCT00767988
View directory record Official record
Conditions
Urinary Tract Infection
Interventions
Urex-cap-5 (2x10^9 cfu each of Lactobacillus reuteri RC-14 and Lactobacillus rhamnosus GR-1), Placebo
Dietary Supplement · Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
3 Months to 17 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
2
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Sep 15, 2015 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 4 Interventional

Irritable Bowel Syndrome Evaluation and Treatment in Primary Care

NCT01641341
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Bifidobacterium infantis, Pancrelipase, Nitazoxanide, Placebo
Drug
Lead sponsor
American Academy of Family Physicians
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
9
States / cities
Lomita, California • Leawood, Kansas • Baton Rouge, Louisiana + 4 more
Source: ClinicalTrials.gov public record
Updated Jan 23, 2019 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 2 Interventional Results available

A Controlled Trial to Evaluate the Effects of GanedenBC30 on the Immune System

NCT01184456
View directory record Official record
Conditions
HIV Infection, Gastrointestinal Symptoms
Interventions
GanedenBC30, GBI-30, PTA-6086, Placebo
Dietary Supplement · Drug
Lead sponsor
AIDS Healthcare Foundation
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Beverly Hills, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2021 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of Lactobacillus Rhamnosus GG ATCC 53103 (LGG) in Healthy Volunteers

NCT00934453
View directory record Official record
Conditions
Healthy
Interventions
Lactobacillus rhamnosus GG ATCC 53103, Placebo
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 50 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2012
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 11, 2017 · Synced Oct 18, 2026, 8:03 PM EDT
Not listed Not applicable Interventional

Can Lifestyle Changes Reverse Early-Stage Alzheimer's Disease

NCT04606420
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Lifestyle medicine
Behavioral
Lead sponsor
Preventive Medicine Research Institute
Other
Eligibility
45 Years to 90 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
4
States / cities
San Diego, California • Sausalito, California • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 15, 2022 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Adolescent Probiotics in Stressed Adolescents

NCT07565883
View directory record Official record
Conditions
Cognitive Ability, General, Immune System Function, Emotions
Interventions
Probiotics, placebo
Dietary Supplement
Lead sponsor
University of Utah
Other
Eligibility
12 Years to 20 Years
Enrollment
104 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
2
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Bacillus Subtilis BS50 Supplementation on Gastrointestinal Symptoms in Healthy Adults

NCT05004454
View directory record Official record
Conditions
Gastrointestinal Health, Immune Health, Cardiovascular Health, Digestive Health
Interventions
Bacillus subtilis BS50 spore preparation, Maltodextrin
Dietary Supplement
Lead sponsor
BIO-CAT Microbials, LLC
Industry
Eligibility
30 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 5, 2023 · Synced Oct 18, 2026, 8:03 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Evaluating the Effects of a Synbiotic Versus Probiotic or Placebo on Gut Microbiota and Cardiometabolic Health: A Randomized Double-Blind Placebo Controlled Trial

NCT06544915
View directory record Official record
Conditions
Blood Pressure, Body Composition, Immune Function
Interventions
Synbiotic, Probiotic, Placebo
Dietary Supplement
Lead sponsor
Skidmore College
Other
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Saratoga Springs, New York
Source: ClinicalTrials.gov public record
Updated Aug 9, 2024 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Probiotics in Occupational Shift Workers

NCT02951689
View directory record Official record
Conditions
Shift-Work Related Sleep Disturbance, Healthy
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
22 Years to 55 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 19, 2018 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional

Prebiotic vs Probiotic in Multiple Sclerosis

NCT04038541
View directory record Official record
Conditions
Multiple Sclerosis, Clinically Isolated Syndrome (CIS)
Interventions
Prebiotics (Prebiotin Prebiotic Fiber Stick Pac), Probiotics (Visbiome®)
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
2
States / cities
New York, New York • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced Oct 18, 2026, 8:03 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers Results available

The Efficacy of Probiotics to Reduce Antepartum Group B Streptococcus Colonization.

NCT03696953
View directory record Official record
Conditions
Group B Streptococcus Carrier in Childbirth, Gastrointestinal Symptoms
Interventions
Florajen3
Biological
Lead sponsor
Marquette University
Other
Eligibility
18 Years and older · Female only
Enrollment
109 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Mar 21, 2024 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of 3 Probiotic Strains on Bile Acids, Satiety, and Inflammation

NCT01879098
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jul 10, 2014 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Early Phase 1 Interventional Results available

Probiotics for Quality of Life in Autism Spectrum Disorders

NCT02903030
View directory record Official record
Conditions
Autism Spectrum Disorders, Anxiety
Interventions
Maltose (placebo), Visbiome Extra Strength
Drug
Lead sponsor
Ohio State University
Other
Eligibility
3 Years to 12 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Dogs as Probiotics

NCT02343731
View directory record Official record
Conditions
Health of the Human Microbiome
Interventions
Introduction of a dog into the home
Other
Lead sponsor
University of Arizona
Other
Eligibility
50 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Jan 12, 2016 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional

Probiotics in Infants With Cyanotic Congenital Heart Disease

NCT01018472
View directory record Official record
Conditions
Cyanotic Congenital Heart Disease
Interventions
Bifidobacterium infantis, Placebo
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
Up to 4 Months
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 2, 2014 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Evaluation of Bacillus Subtilis R0179 in Healthy Young Adults

NCT01802151
View directory record Official record
Conditions
Healthy
Interventions
B. subtilis R0179, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 50 Years
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 17, 2015 · Synced Oct 18, 2026, 8:03 PM EDT
Terminated Phase 1 Interventional

Probiotics in the Reduction of Antibiotic Associated Diarrhea

NCT02589964
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Florajen-3, Placebo
Dietary Supplement · Other
Lead sponsor
TriHealth Inc.
Other
Eligibility
18 Years to 120 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 31, 2016 · Synced Oct 18, 2026, 8:03 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A Study to Evaluate OPTI-BIOME™ Bacillus Subtilis MB40 on Abdominal Discomfort, Gas and Bloating in a Healthy Population

NCT02950012
View directory record Official record
Conditions
Bloating
Interventions
OPTI-BIOME™ Bacillus subtilis MB40, Placebo
Dietary Supplement · Other
Lead sponsor
BIO-CAT Microbials, LLC
Industry
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Foothill Ranch, California • Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Oct 29, 2021 · Synced Oct 18, 2026, 8:03 PM EDT
Not listed No phase listed Observational

Select Nutrient and Gene Variant Analysis in a Targeted Diet and Lifestyle Intervention Reduces Preterm Birth

NCT05436119
View directory record Official record
Conditions
Premature Birth, Pre-Eclampsia, Small for Gestational Age Infant
Interventions
GrowBaby
Dietary Supplement
Lead sponsor
GrowBaby Life Project
Other
Eligibility
Female only
Enrollment
200 participants
Timeline
2022 – 2023
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jun 28, 2022 · Synced Oct 18, 2026, 8:03 PM 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 10, 2026 · Synced Oct 18, 2026, 8:03 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Gut Microbiome and Its Association With Pediatric Stress and Cognition

NCT06269614
View directory record Official record
Conditions
Autism Spectrum Disorder, Adverse Childhood Experiences, Stress Reaction
Interventions
Probiotic
Dietary Supplement
Lead sponsor
Nova Southeastern University
Other
Eligibility
4 Years to 95 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Davie, Florida
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 18, 2026, 8:03 PM EDT