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 24, 2026, 10:17 AM EDT

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

Showing 193–216 of 680 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Intestinal Microbiome Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Pilot Evaluation of Two Test Materials With a Positive Control When Used as a Patient Preoperative Skin Preparation

NCT03861780
View directory record Official record
Conditions
Bacteria Microflora Reduction
Interventions
Project X 26ml, Project X 5.1ml, Prevantics Maxi Swabstick
Drug
Lead sponsor
Professional Disposables International, Inc.
Industry
Eligibility
18 Years and older
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated Oct 22, 2021 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

The Effects of a Novel Probiotic Supplement on Menopausal Symptoms and Bone Health

NCT04001088
View directory record Official record
Conditions
Menopause
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Lallemand Health Solutions
Industry
Eligibility
40 Years to 59 Years · Female only
Enrollment
144 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
5
States / cities
Lake Worth, Florida • Port Saint Lucie, Florida • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2023 · Synced Oct 24, 2026, 10:17 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Fiber and Calcium Absorption in Older Men

NCT06519877
View directory record Official record
Conditions
Aging
Interventions
Soluble corn fiber
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
60 Years and older · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Novel Food Product Containing Microbiota Accessible Carbohydrates on the Human Microbiome

NCT03058575
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jan 23, 2018 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Short-term Diet on HDL Composition and Function

NCT03205254
View directory record Official record
Conditions
Diet Modification, HDL, Inflammation
Interventions
Mediterranean Diet, Fast food diet
Other
Lead sponsor
University of California, Davis
Other
Eligibility
19 Years to 30 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Aug 12, 2021 · Synced Oct 24, 2026, 10:17 AM EDT
Completed No phase listed Observational

Identifying Biomarkers of Gastro Intestinal Comorbidities in Autism Spectrum Disorder

NCT07744217
View directory record Official record
Conditions
Autism, Gastro Intestinal Diseases
Interventions
Not listed
Lead sponsor
The Center for Discovery
Other
Eligibility
5 Years to 19 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Harris, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Oct 24, 2026, 10:17 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 24, 2026, 10:17 AM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

Ecosystem Nourishment for Gut Restoration After Fecal Transplantation

NCT07826793
View directory record Official record
Conditions
Aging
Interventions
Fecal Microbiota Transplant Capsules, Microbiome Rejuvenating Diet, Placebo Fecal Microbiota Transplantation
Drug · Behavioral · Other
Lead sponsor
Stanford University
Other
Eligibility
40 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Successful Fiber Food Introduction in Short Bowel Syndrome

NCT06240065
View directory record Official record
Conditions
Short Gut Syndrome
Interventions
Green bean puree
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
4 Months to 17 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Oct 24, 2026, 10:17 AM EDT
Recruiting No phase listed Observational

Assess Diversity of Gut Microbiome in Met NSCLC in Correlation to Tx & Adverse Effects

NCT06221800
View directory record Official record
Conditions
Non Small Cell Lung Cancer
Interventions
Microbiome
Diagnostic Test
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Predicting Adenomatous Polyps in the Colon Using Images of a Human Tongue

NCT06305364
View directory record Official record
Conditions
Colorectal Neoplasms, Gastrointestinal Microbiome
Interventions
Gixam
Device
Lead sponsor
Jubaan Ltd.
Industry
Eligibility
18 Years to 75 Years
Enrollment
426 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Satiety, Glycemic, and Gastrointestinal Effects of Novel Fibers

NCT00958399
View directory record Official record
Conditions
Healthy
Interventions
Placebo, Resistant Starch, Resistant starch + soluble fiber, Fiber made from corn starch, Fiber made from corn starch + soluble fiber
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2010
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 6, 2012 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Phase 3 Interventional

Effect of Adjunctive Treatment With Arestin on the Subgingival Microflora in Patients With Moderate to Advanced Periodontitis

NCT00371332
View directory record Official record
Conditions
Periodontitis
Interventions
Minocycline HCL Microspheres
Drug
Lead sponsor
OraPharma
Industry
Eligibility
30 Years to 65 Years
Enrollment
128 participants
Timeline
Started 2004
U.S. locations
5
States / cities
Los Angeles, California • Baltimore, Maryland • Boston, Massachusetts + 2 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2006 · Synced Oct 24, 2026, 10:17 AM EDT
Recruiting Not applicable Interventional

Gut Microbiome, Adverse Effects, and Markers Through MEtabolic Reprogramming

NCT06536881
View directory record Official record
Conditions
Breast Cancer, Early-stage Breast Cancer
Interventions
Fasting
Behavioral
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 21, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Blueberry Consumption on Gastrointestinal Health

NCT03934177
View directory record Official record
Conditions
Obesity, Circadian Dysregulation
Interventions
Blueberry powder, Placebo powder
Dietary Supplement
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
19 Years to 70 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
2
States / cities
Lincoln, Nebraska • Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Mar 22, 2023 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Yogurt and GI Health

NCT05931471
View directory record Official record
Conditions
Yogurt Intake, Gastrointestinal Immune Function, Gut Microbiome, Gut Health
Interventions
Yogurt Intervention
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
50 Years to 75 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Mar 18, 2025 · Synced Oct 24, 2026, 10:17 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Synbiotic Dietary Supplement and Gut Microbiota

NCT04097106
View directory record Official record
Conditions
Healthy
Interventions
Synbiotic
Dietary Supplement
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 45 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 9, 2024 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Modulation of the Intestinal Microbiome by a High Protein Diet

NCT04812964
View directory record Official record
Conditions
Obesity
Interventions
Protein powder supplement, standard dosage based on 0.5 gram protein per pound of subject's lean body mass, Protein powder supplement, High Level Protein, based on 1 gram of protein per pound of lean body mass: 25% protein and 45% carbohydrate
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
20 Years to 60 Years
Enrollment
106 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
West Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 7, 2024 · Synced Oct 24, 2026, 10:17 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effects of Type 1 Diabetes Mellitus and Increased Weight on Gut Microbiome and Urine Metabolome Profiles in Children

NCT02938806
View directory record Official record
Conditions
Obesity, Overweight, Type 1 Diabetes Mellitus
Interventions
No intervention
Other
Lead sponsor
University of California, San Diego
Other
Eligibility
7 Years to 17 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated May 31, 2022 · Synced Oct 24, 2026, 10:17 AM EDT
Active, not recruiting Phase 2 Interventional

Resistant Maltodextrin for Gut Microbiome in Parkinson's Disease: Safety and Tolerability Study

NCT03667404
View directory record Official record
Conditions
Parkinson Disease, Intestinal Bacteria Flora Disturbance, Dietary Modification
Interventions
Resistant maltodextrin, maltodextrin
Dietary Supplement
Lead sponsor
Northwestern University
Other
Eligibility
60 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Active, not recruiting Not applicable Interventional

Gut Microbe Composition, Exercise, and Breast Breast Cancer Survivors

NCT04088708
View directory record Official record
Conditions
Breast Cancer, Gut Microbiome, Exercise, Fatigue
Interventions
Aerobic Exercise Training, Attention Control
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 74 Years · Female only
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 16, 2025 · Synced Oct 24, 2026, 10:17 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Commercially Available Synbiotic on the Gut Microbiome and Cardiometabolic Health

NCT07515443
View directory record Official record
Conditions
Hypertension, Gut Dysbiosis, Overweight , Obesity
Interventions
Synbiotic, Placebo
Dietary Supplement
Lead sponsor
Southern Utah University
Other
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Cedar, Utah
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 24, 2026, 10:17 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Gut Microbiota Composition in Hispanic and Non-Hispanic Children.

NCT03990350
View directory record Official record
Conditions
Obesity
Interventions
Fecal Sample Collection, Physical Activity Questionnaire, Food Frequency Questionnaire, 24-hour dietary recall diary
Other
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Years to 12 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 30, 2020 · Synced Oct 24, 2026, 10:17 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Mango or Low-Fat Cookie Consumption on Gut Health, and Its Relationship With Mental, Sexual and Skin Health

NCT06800833
View directory record Official record
Conditions
Gut Microbiome
Interventions
Low fat cookies, Mango
Other
Lead sponsor
San Diego State University
Other
Eligibility
18 Years to 50 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 30, 2026 · Synced Oct 24, 2026, 10:17 AM EDT