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ClinicalTrials.gov public records Last synced Oct 21, 2026, 3:00 AM EDT

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Showing 1–24 of 483 matching trials from the live ClinicalTrials.gov search.
Conditions
Crohn's Disease
Interventions
Fluconazole, Vancomycin, Neomycin, Ciprofloxacin, Polyethylene Glycol 3350, Promethazine, Fluconazole placebo
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 75 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Completed Not applicable Interventional Accepts healthy volunteers Results available

Calcium: Magnesium Balance, Microbiota, and Necroptosis and Inflammation

NCT04229992
Conditions
Colorectal Cancer
Interventions
Magnesium glycinate, Placebo
Dietary Supplement
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
40 Years to 85 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
1
States / cities
Nashville, Tennessee
Conditions
Intestinal Graft Versus Host Disease
Interventions
Colonoscopy, Fecal Microbiota Transplantation, Nutritional Supplementation, Survey Administration, Biospecimen Collection
Procedure · Biological · Dietary Supplement + 1 more
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Conditions
Gut Microbiome
Interventions
Dietary MACs, Control
Dietary Supplement · Other
Lead sponsor
Access Business Group
Industry
Eligibility
40 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Addison, Illinois
Conditions
Gastrointestinal Injury, Acute Mountain Sickness
Interventions
FP, Placebo, High altitude, Sea level
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Natick, Massachusetts
Conditions
Infection Due to Resistant Organism
Interventions
Fecal Microbiota Transplant (FMT), Bowel preparation, Stool or perirectal swab sampling, Fasting
Biological · Procedure · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Conditions
Obesity, Diabetes
Interventions
Diet and physical activity monitoring
Behavioral
Lead sponsor
Loyola University
Other
Eligibility
18 Years to 50 Years
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2025
U.S. locations
1
States / cities
Maywood, Illinois
Conditions
Healthy
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
65 Years to 80 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012
U.S. locations
1
States / cities
Gainesville, Florida
Conditions
Colon Cancer Prevention
Interventions
High chlorophyll diet - intervention 1st, High chlorophyll diet - control 1st
Behavioral
Lead sponsor
Auburn University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Auburn, Alabama
Conditions
Ulcerative Colitis
Interventions
Fecal Microbiota Transplant
Biological
Lead sponsor
Baylor College of Medicine
Other
Eligibility
12 Years to 20 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Houston, Texas
Conditions
Cancer
Interventions
High-fermented food, High fiber supplementation
Dietary Supplement
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Conditions
Ulcerative Colitis
Interventions
Ulcerative Colitis Diet (UCD)
Other
Lead sponsor
Children's Hospital of Philadelphia
Other
Eligibility
8 Years to 19 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Conditions
Clostridium Difficile
Interventions
Fecal Microbiota Preparation
Drug
Lead sponsor
Microbiome Health Research Institute
Other
Eligibility
18 Years to 75 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
4
States / cities
Naperville, Illinois • Indianapolis, Indiana • Boston, Massachusetts + 1 more
Completed Not applicable Interventional Accepts healthy volunteers

Trimethylamine-N-oxide Production and Metabolism

NCT02558673
Conditions
Healthy
Interventions
TMAO dietary precursors, Control (or active comparator)
Other
Lead sponsor
Cornell University
Other
Eligibility
21 Years to 50 Years · Male only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Ithaca, New York
Completed Not applicable Interventional Accepts healthy volunteers

Microbiota Diversity and Composition and Polyphenol Bioavailability

NCT02677649
Conditions
Fecal Microbiota
Interventions
cranberry, placebo
Other
Lead sponsor
Tufts University
Other
Eligibility
20 Years to 55 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Short-Term Effects of Multi-Fiber Supplementation on Gut Health

NCT07787026
Conditions
Mixed Fiber Supplementation for Healthy Adults
Interventions
Prebiotic, Placebo
Dietary Supplement
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Providence, Rhode Island
Conditions
Health Behavior
Interventions
Not listed
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
2 Days to 7 Months
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Urbana, Illinois
Conditions
Colorectal Cancer
Interventions
Physical activity intervention
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
21 Years to 69 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
New York, New York
Conditions
Advanced Non Small Cell Lung Cancer
Interventions
aerosolized aztreonam, aerosolized vancomycin, pembrolizumab
Drug
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 120 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Bethesda, Maryland
Conditions
Infection
Interventions
Not listed
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Not listed
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Completed Not applicable Interventional Accepts healthy volunteers

The Salty Gut: Effects of High Dietary Salt Intake on the Gut Microbiota

NCT04229680
Conditions
Cardiovascular Risk Factor
Interventions
High Salt, Recommended Salt
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Newark, Delaware
Conditions
Vitamin A Deficiency
Interventions
Not listed
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
12 Months to 24 Months
Enrollment
258 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
2
States / cities
Davis, California
Conditions
Microbial Colonization, Cardiovascular Diseases, Obesity
Interventions
Freeze Dried Strawberry Powder, Isocaloric powder
Other
Lead sponsor
University of California, Davis
Other
Eligibility
40 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Davis, California
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Autologous Fecal Therapy

NCT02046525
Conditions
Infectious Disease of Digestive Tract
Interventions
Autologous fecal microbiota therapy, Placebo
Biological · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 70 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
St Louis, Missouri