Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results come from ClinicalTrials.gov. When the live registry is unavailable, a clearly labeled stored copy may be shown.

Clear filters

These results were retrieved from the live ClinicalTrials.gov registry. Filters and sort order apply to this result list.

ClinicalTrials.gov public records Last synced Oct 27, 2026, 9:27 AM EDT

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

Showing 625–648 of 680 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Intestinal Microbiome Clear all
Completed Not applicable Interventional

Prebiotics, Gut Microbiota, and Cardiometabolic Health

NCT02346838
View directory record Official record
Conditions
Prediabetes
Interventions
Inulin, Placebo
Dietary Supplement
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
40 Years to 70 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Blacksburg, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Vaccine Observation to Include All Communities for Equitable Science

NCT04770649
View directory record Official record
Conditions
Vaccine Response Impaired, Vaccine Adverse Reaction
Interventions
COVID-19 vaccine
Biological
Lead sponsor
Persephone Biosciences
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2024 · Synced Oct 27, 2026, 9:27 AM EDT
Enrolling by invitation No phase listed Observational

Enabling Microbiomics- Driven Personalized Nutrition

NCT06657001
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS), Celiac Disease, Diarrhea, Constipation, Microbiome, Crohn's Disease, UC - Ulcerative Colitis, Microscopic Colitis, Functional Dyspepsia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
4,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Recruiting Not applicable Interventional

Wild Blueberries for Gut, Brain, and Cardiometabolic Health in Prediabetes

NCT06735651
View directory record Official record
Conditions
Prediabetes (Insulin Resistance, Impaired Glucose Tolerance), Female, Adult, Endothelial Function (Reactive Hyperemia), Arterial Stiffness, Cognition, Oxidative Stress, Gut Microbiota, Overweight, Inflammation, Microvascular Function, Body Composition
Interventions
Wild Blueberry, Placebo
Dietary Supplement
Lead sponsor
Georgia State University
Other
Eligibility
20 Years to 65 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Completed No phase listed Observational

Gut Microbiota in Intestinal Barrier Damage in Acute Leukemia Patients Undergoing Inpatient Induction

NCT03316456
View directory record Official record
Conditions
Chemotherapy-Induced Gut Barrier Damage, Acute Leukemia
Interventions
Observational: Stool Sample Collection, Observational: Blood Sample Collection, Observational: Urine Sample Collection
Diagnostic Test
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years to 99 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 6, 2019 · Synced Oct 27, 2026, 9:27 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Age-associated Arterial Dysfunction, Western Diet, and Aerobic Exercise: Role of the Gut Microbiome

NCT03334201
View directory record Official record
Conditions
Aging
Interventions
Western Diet, Non-Western Diet
Other
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years to 79 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 28, 2021 · Synced Oct 27, 2026, 9:27 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Horton & Maizy Pilot Study for Resistant to Starch

NCT01338571
View directory record Official record
Conditions
pH, Weight Gain
Interventions
Not listed
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
5 Years to 15 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 18, 2015 · Synced Oct 27, 2026, 9:27 AM EDT
Recruiting Phase 2 Interventional

Resistant Potato Starch to Alleviate GWI

NCT05820893
View directory record Official record
Conditions
Gulf War Illness
Interventions
Resistant Potato Starch
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
50 Years to 85 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Withdrawn No phase listed Observational

A Pilot Study to Explore the Role of Gut Flora in Chronic Constipation

NCT04148248
View directory record Official record
Conditions
Constipation, Constipation Chronic Idiopathic, Constipation - Functional, Constipation (Excl Faecal Impaction)
Interventions
No intervention
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Antimicrobial-free Production of Beef Cattle's Affect on Gut Microbiome

NCT04023604
View directory record Official record
Conditions
Diet Modification
Interventions
Controlled diet with beef raised without antibiotics, Controlled diet with beef produced in conventional systems
Other
Lead sponsor
Purdue University
Other
Eligibility
21 Years to 69 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 28, 2022 · Synced Oct 27, 2026, 9:27 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Exploratory Study of Circadian Relationships Between Social Behavior, Blood Pressure and Metabolomics

NCT02249793
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
25 Years to 35 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Adding Chickpeas to the American Diet on Fecal Microbiota Composition and Markers of Inflammation

NCT02375347
View directory record Official record
Conditions
Inflammation
Interventions
Chickpea Enhanced Diet (Short term)
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 30, 2016 · Synced Oct 27, 2026, 9:27 AM EDT
Withdrawn Phase 2 Interventional

OMega-3 Fatty Acid for the Immune Modulation of Colorectal Cancer

NCT03661047
View directory record Official record
Conditions
Colon Cancer
Interventions
AMR101 (VASCEPA, icosapent ethyl)
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 17, 2021 · Synced Oct 27, 2026, 9:27 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 24, 2025 · Synced Oct 27, 2026, 9:27 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Role of the Gut Microbiome in Complex Regional Pain Syndrome

NCT03612193
View directory record Official record
Conditions
Complex Regional Pain Syndromes
Interventions
Not listed
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 5, 2025 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mediterranean Diet and the Gut Microbiome

NCT03269032
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
American Diet, Mediterranean-style Diet
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 22, 2023 · Synced Oct 27, 2026, 9:27 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Blackcurrants Modify Gut Microbiota and Reduce Osteoporosis Risk in Postmenopausal Females

NCT07365514
View directory record Official record
Conditions
Postmenopausal Osteoporosis, Gut Microbiome, Menopause
Interventions
Blackcurrant (BC) extract, Placebo
Drug
Lead sponsor
University of Connecticut
Other
Eligibility
45 Years to 70 Years · Female only
Enrollment
159 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Interactions of Human Gut Microbiota With Intestinal Sweet Taste Receptors

NCT03032640
View directory record Official record
Conditions
Obesity
Interventions
Oral Glucose Tolerance Test (OGTT), Assessment of dietary compliance, Stool sampling, Sodium Saccharin, Placebo, Lactisole
Other
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 45 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Feb 2, 2023 · Synced Oct 27, 2026, 9:27 AM EDT
Recruiting No phase listed Observational

Intestinal Microbiota in Stem Cell Transplant Transplant Admission

NCT04623424
View directory record Official record
Conditions
Stem Cell Transplant Complications
Interventions
intestinal microbiota
Diagnostic Test
Lead sponsor
Henry Ford Health System
Other
Eligibility
18 Years to 80 Years
Enrollment
255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Essential Oil-Based Product System for Digestive Support

NCT07653815
View directory record Official record
Conditions
Healthy
Interventions
essential oil supplement, Essential Oil, Placebo supplement, placebo essential oil
Dietary Supplement · Other
Lead sponsor
dōTERRA International
Industry
Eligibility
18 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Pleasant Grove, Utah
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Discrimination and the Brain-Gut-Microbiome (BGM) Axis

NCT05120908
View directory record Official record
Conditions
Discrimination, Racial, Social Isolation, Stress
Interventions
Not listed
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
266 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 27, 2026, 9:27 AM EDT
Completed No phase listed Observational

Vitamin A, Stool Microbiota and Vaccine Response in Bangladeshi Infants

NCT02027610
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Nov 18, 2015 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of a Synbiotic on the Gut Microbiota and Adiposity-related Markers in Healthy Overweight Subjects

NCT02151825
View directory record Official record
Conditions
Gut Microbiota, Adiposity
Interventions
Synbiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Texas State University, San Marcos
Other
Eligibility
18 Years to 64 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
San Marcos, Texas
Source: ClinicalTrials.gov public record
Updated May 30, 2014 · Synced Oct 27, 2026, 9:27 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Impact on Intestinal Sulfate Metabolism

NCT05333900
View directory record Official record
Conditions
Healthy Nutrition
Interventions
Plant-Based Diet then animal-based diet, Animal-based diet then plant-based diet
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 5, 2023 · Synced Oct 27, 2026, 9:27 AM EDT