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ClinicalTrials.gov public records Last synced Oct 30, 2026, 9:29 AM EDT

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Showing 1–24 of 195 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool Samples Clear all
Not listed No phase listed Observational

A Study of the Relationship of Gut Microbial Composition and Stroke Outcome

NCT03470506
View directory record Official record
Conditions
Ischemic Stroke
Interventions
Stool Samples
Other
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
2
States / cities
Charlottesville, Virginia • Fairfax, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 19, 2019 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational

Immuno-Oncology Database and Bioregistry

NCT04656873
View directory record Official record
Conditions
Malignancy, Immune System Diseases, Autoimmune Diseases
Interventions
Biospecimen Collection, Medical Chart Review, Questionnaires/Surveys
Procedure · Other
Lead sponsor
UNC Lineberger Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Association Between Gut Microbiome and Dietary Determinants and Vaccine Response

NCT05239403
View directory record Official record
Conditions
Influenza
Interventions
Biospecimen Collection, Questionnaire Administration
Procedure · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Recruiting Not applicable Interventional

Clinical and Neurobehavioral Changes With Weight Loss Drug Discontinuation and Reinitiation

NCT07387796
View directory record Official record
Conditions
Drug Discontinuation, Substance Use Disorders, Eating Behavior Changes, Tirzepatide
Interventions
Discontinuation and Reinitiation of Tirzepatide
Other
Lead sponsor
The University of Texas at Dallas
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Active, not recruiting No phase listed Observational

Exploring Relevant Immune-based Biomarkers and Circulating Tumor Cells During Treatment With Immunotherapy in Genitourinary Malignancies (CTC Immune Based Biomarkers)

NCT02978118
View directory record Official record
Conditions
Carcinoma, Renal Cell, Carcinoma, Urothelial
Interventions
Immune cell and CTC detection procedures
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Blood Samples to Identify Biomarkers in Patients Treated With Cyclophosphamide After Donor Stem Cell Transplant

NCT04160390
View directory record Official record
Conditions
Allogeneic Hematopoietic Stem Cell Transplant Recipient, Donor, Malignant Neoplasm
Interventions
Biospecimen Collection-Blood, Biospecimen Collection-Stool
Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2027
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Collection of Data and Samples From Healthy Donors for Use in Translational Research

NCT00090662
View directory record Official record
Conditions
Healthy Volunteer
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 85 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Recruiting No phase listed Observational

Increasing Pre-Surgical Identification of Muscle Invasive Tumor Evaluations Prior to Planned Cystectomy (INSITE)

NCT06396533
View directory record Official record
Conditions
Urothelial Carcinoma, Muscle Invasive Bladder Urothelial Carcinoma, Non-Muscle Invasive Bladder Urothelial Carcinoma
Interventions
Not listed
Lead sponsor
Fox Chase Cancer Center
Other
Eligibility
18 Years and older
Enrollment
92 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
2
States / cities
Omaha, Nebraska • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 30, 2026, 9:29 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Prospective Screening for Pancreatic Ductal Adenocarcinoma in High-Risk Individuals

NCT06122896
View directory record Official record
Conditions
Pancreatic Cancer, Pancreatic Ductal Adenocarcinoma, PDAC, PDAC - Pancreatic Ductal Adenocarcinoma, Pancreatic Neoplasm
Interventions
Screening Blood Tests, Endoscopic Ultrasound, Magnetic Resonance Imaging, Magnetic Resonance Cholangiopancreatography
Other · Diagnostic Test · Combination Product
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
5,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2041
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 29, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Fruit/Vegetable Drinks on the Human Intestine

NCT02377063
View directory record Official record
Conditions
Intestinal Bacteria Flora Disturbance
Interventions
Pressed Juice
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced Oct 30, 2026, 9:29 AM EDT
Active, not recruiting Phase 2 Interventional

Pirtobrutinib and Venetoclax With MRD Detection for Previously Untreated Chronic Lymphocytic Leukemia

NCT05677919
View directory record Official record
Conditions
Chronic Lymphocytic Leukemia, Small Lymphocytic Lymphoma
Interventions
Biospecimen Collection, Bone Marrow Aspiration, Bone Marrow Biopsy, Computed Tomography, Magnetic Resonance Imaging, Pirtobrutinib, Positron Emission Tomography, Venetoclax, Echocardiography, Multigated Acquisition Scan, Biopsy
Procedure · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 12, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Microbiome and Axial Spondyloarthritis

NCT04713995
View directory record Official record
Conditions
Axial Spondyloarthritis
Interventions
Dietary recommendations
Other
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jul 8, 2022 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational

Collection of Biological Samples From Patients With Hepatitis-Associated Aplastic Anemia

NCT00050115
View directory record Official record
Conditions
Hepatitis-Associated Aplastic Anemia
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
2 Years to 100 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 8, 2021 · Synced Oct 30, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial Investigating if Antibiotic Use in the First 48 Hours of Life Adversely Impacts the Preterm Infant Microbiome

NCT02477423
View directory record Official record
Conditions
Premature Birth of Newborn, Enterocolitis, Necrotizing
Interventions
Ampicillin, Gentamicins, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
Up to 6 Hours
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Adherence to Minimally Invasive Testing

NCT02251782
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Epi proColon Test, Fecal Immunochemical Test (FIT)
Device
Lead sponsor
Epigenomics, Inc
Industry
Eligibility
50 Years to 76 Years
Enrollment
490 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
2
States / cities
Portland, Oregon • Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2015 · Synced Oct 30, 2026, 9:29 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Scavenging of Reactive Carbonyl Species by Blueberries in Humans

NCT07873723
View directory record Official record
Conditions
Human Health, Reactive Carbonyl Species, Polyphenols
Interventions
Blueberries, control group
Dietary Supplement
Lead sponsor
North Carolina Agriculture & Technical State University
Other
Eligibility
25 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 14, 2026 · Synced Oct 30, 2026, 9:29 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 30, 2026, 9:29 AM EDT
Recruiting Not applicable Interventional

Engagement of American Indians of Southwestern Tribal Nations in Cancer Genome Sequencing

NCT06207864
View directory record Official record
Conditions
Malignant Neoplasm
Interventions
Biospecimen Collection, Return of Results, Survey Administration
Procedure · Other
Lead sponsor
New Mexico Cancer Research Alliance
Other
Eligibility
18 Years and older
Enrollment
1,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Food DNA Digestion

NCT06687226
View directory record Official record
Conditions
Digestion Rate
Interventions
Reconstitutable food powder
Dietary Supplement
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2027
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Clinical Validation of An Optimized Multi-Target Stool DNA (Mt-sDNA 2.0) Test, for Colorectal Cancer Screening "BLUE-C"

NCT04144738
View directory record Official record
Conditions
Colorectal Cancer
Interventions
mt-sDNA 2.0 screening test, FIT test, Colonoscopy
Diagnostic Test · Procedure
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years and older
Enrollment
26,758 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
195
States / cities
Birmingham, Alabama • Cullman, Alabama • Dothan, Alabama + 161 more
Source: ClinicalTrials.gov public record
Updated Sep 1, 2023 · Synced Oct 30, 2026, 9:29 AM EDT
Recruiting Phase 4 Interventional

Rifaximin 200 mg Plus Oral Rehydration vs Oral Rehydration Alone in Children With Acute Diarrhea

NCT07285785
View directory record Official record
Conditions
Diarrhea, Gastroenteritis, Bacterial Infection, Acute Diarrhea
Interventions
Rifaximin 200 mg Tablet, Oral Rehydration Therapy (ORT)
Drug · Other
Lead sponsor
Bausch Health Americas, Inc.
Industry
Eligibility
6 Years to 12 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
10
States / cities
Lynwood, California • Hialeah, Florida • Miami, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Enrolling by invitation No phase listed Observational

Development and Analysis of a Stool Bank for Cancer Patients

NCT04291755
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung, Carcinoma, Colorectal
Interventions
Pembrolizumab Injection
Drug
Lead sponsor
Persephone Biosciences
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
2
States / cities
Fountain Valley, California • Winter Haven, Florida
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

An Evaluation of a Multi-target Stool DNA (Mt-sDNA) Test, Cologuard, for CRC Screening in Individuals Aged 45-49 and at Average Risk for Development of Colorectal Cancer: Act Now

NCT03728348
View directory record Official record
Conditions
Colorectal Cancer
Interventions
mt-sDNA screening test, Colonoscopy
Diagnostic Test · Procedure
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
45 Years to 49 Years
Enrollment
983 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
39
States / cities
Phoenix, Arizona • Camarillo, California • Laguna Hills, California + 35 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2021 · Synced Oct 30, 2026, 9:29 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome and the Gut-Brain Axis

NCT02693327
View directory record Official record
Conditions
Mental Disorder
Interventions
Biological Sample, Blood Sample
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 80 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 15, 2018 · Synced Oct 30, 2026, 9:29 AM EDT