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ClinicalTrials.gov public records Last synced Sep 5, 2026, 8:59 AM EDT

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Showing 1–24 of 192 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Stool samples Clear all
Not listed No phase listed Observational

Gut Microbiome and Ventricular Arrhythmias

NCT04466072
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Gut Microbiome
Interventions
Stool test for microbial analysis
Diagnostic Test
Lead sponsor
North Florida Foundation for Research and Education
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 17, 2022 · Synced Sep 5, 2026, 8:59 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

A Study of the Possible Effects of Medication on Young Onset Colorectal Cancer (YOCRC)

NCT05568420
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Not listed
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years to 49 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational

Gastrointestinal Microbiome Influence on the Development of Bronchopulmonary Dysplasia

NCT03229967
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
16S rRNA stool microbiome sequencing.
Diagnostic Test
Lead sponsor
University of Tennessee
Other
Eligibility
0 Days to 7 Days
Enrollment
197 participants
Timeline
2017 – 2020
U.S. locations
2
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 9, 2023 · Synced Sep 5, 2026, 8:59 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Exercise, Hypertension, and Gut Dysbiosis in African Americans

NCT03897777
View directory record Official record
Conditions
Hypertension
Interventions
Exercise Training effect on Hypertension and Gut Dysbiosis
Behavioral
Lead sponsor
North Carolina Agriculture & Technical State University
Other
Eligibility
30 Years to 50 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2030
U.S. locations
1
States / cities
Greensboro, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Establishing a Diagnostic and Therapeutic Index in Autism Spectrum Disorder (ASD) and Fragile X Syndrome

NCT04869930
View directory record Official record
Conditions
Autism Spectrum Disorder, Fra(X) Syndrome
Interventions
specimen collection
Other
Lead sponsor
Nova Mentis Life Science Corp
Industry
Eligibility
6 Months to 21 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Oct 12, 2021 · Synced Sep 5, 2026, 8:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Scavenging of Reactive Carbonyl Species by Dietary Flavonoids in Humans

NCT05773794
View directory record Official record
Conditions
Human Health, Reactive Carbonyl Species, Polyphenols
Interventions
Soymilk, green tea, or blueberry, Control group
Dietary Supplement
Lead sponsor
North Carolina Agriculture & Technical State University
Other
Eligibility
25 Years to 70 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of the Ability of a Supplement to Increase Good Bacteria in the Human Intestine and Blood Sugar Levels

NCT01944904
View directory record Official record
Conditions
Pre-diabetic
Interventions
Sugar Pill, XOS 2.8
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2017 · Synced Sep 5, 2026, 8:59 AM EDT
Terminated No phase listed Observational

Monitoring of Immune and Microbial Reconstitution in (HCT) and Novel Immunotherapies

NCT03557749
View directory record Official record
Conditions
Immune and Microbial Reconstitution, Systemic Viral Infection, Acute-graft-versus-host Disease, Chronic Graft-versus-host-disease, Recurrent Malignancy, Cytokine Release Syndrome, Allogenic Related Donors, Cell Therapy/Immunotherapy Patients
Interventions
Blood Sample, Stool Sample, Urine Sample, Bronchoalveolar Lavage (BAL) fluid, Gastrointestinal biopsy x 2-4, Skin biopsy, Skin, mouth, and/or ocular swab, Apheresis Product, Final cellular product
Diagnostic Test
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
Not listed
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 20, 2023 · Synced Sep 5, 2026, 8:59 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 Nov 12, 2025 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Improving Self-Efficacy, Resolving Inflammaging Allo HSCT Survivors in Personal Training

NCT03609203
View directory record Official record
Conditions
Allogeneic HCT Survivors
Interventions
10 Weeks of Strength Trailing, Group Nutrition Discussion: week 1, week 5 and week 10
Other
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational

Hormonal Influences on Inflammatory Bowel Diseases

NCT05610527
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Contraception, Menstrual Problem
Interventions
Proposed study design and randomization scenarios, Repeated measures of validated Inflammatory Bowel Disease Patient Reported Outcome Instruments, Inflammatory marker collection and assessment for correlation with PRO responses and menstrual timing
Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Blood Donor CVD 5000

NCT03971669
View directory record Official record
Conditions
Risk Reduction
Interventions
Vivotif Typhoid Oral Vaccine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2030
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Active, not recruiting No phase listed Observational

Metagenomic Evaluation of the Gut Microbiome in Patients With Lynch Syndrome and Other Hereditary Colonic Polyposis Syndromes

NCT02371135
View directory record Official record
Conditions
Lynch Syndrome, Hereditary Colonic Polyposis Syndromes
Interventions
colonic biopsies, questionnaires
Genetic
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Understanding and Diagnosing Allergic Disease in Twins

NCT01613885
View directory record Official record
Conditions
Allergies
Interventions
No Intervention
Other
Lead sponsor
Stanford University
Other
Eligibility
0 Years to 80 Years
Enrollment
340 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2019
U.S. locations
2
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 16, 2021 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational

Microbiome Changes in Severe Burns

NCT03130868
View directory record Official record
Conditions
Burns Greater Than 20% BSAB, Burns
Interventions
Characterizing changes in the microbiome
Other
Lead sponsor
HealthPartners Institute
Other
Eligibility
17 Years to 120 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 31, 2018 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

ALPCO/Calprotectin CLIA Assay: Expected Values of Calprotectin in Healthy Subjects

NCT07089420
View directory record Official record
Conditions
IBD (Inflammatory Bowel Disease), IBS - Irritable Bowel Syndrome, Crohn Disease (CD), UC - Ulcerative Colitis
Interventions
ALPCO Calprotectin CLIA
Device
Lead sponsor
American Laboratory Products Company
Industry
Eligibility
22 Years and older
Enrollment
121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Salem, New Hampshire
Source: ClinicalTrials.gov public record
Updated Apr 27, 2026 · Synced Sep 5, 2026, 8:59 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 1, 2026 · Synced Sep 5, 2026, 8:59 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 11, 2026 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational

A Pilot Study of Influenza Viruses Isolated From Immunocompromised Children and Adolescents

NCT02352389
View directory record Official record
Conditions
Influenza, Human
Interventions
Blood sample, Nasal swab, Oropharyngeal swab, Stool sample, Symptom checklist
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 21 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 11, 2023 · Synced Sep 5, 2026, 8:59 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 8, 2019 · Synced Sep 5, 2026, 8:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Epidemiology and Pathophysiology of Post-Infectious Functional GI Disorders

NCT03266068
View directory record Official record
Conditions
Campylobacter Infections, Irritable Bowel Syndrome
Interventions
DNA Analysis of Blood Sample, Flexible sigmoidoscopy with colonic biopsies, Small bowel and colonic gastrointestinal permeability, Stool sample analysis
Genetic · Procedure · Diagnostic Test
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 19, 2022 · Synced Sep 5, 2026, 8:59 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Comprehensive Outcomes for After Cancer Health

NCT05349227
View directory record Official record
Conditions
Ovarian Cancer, Breast Cancer, Lung Cancer, Gastric Cancer, Survivorship, Endometrial Cancer, Head and Neck Cancers, Prostate Cancers, Geriatric Oncology, Metastatic Breast Cancer, Metastatic Cancer
Interventions
Digital Health Coaching Program, Fitbit
Behavioral · Device
Lead sponsor
Pack Health
Industry
Eligibility
18 Years and older
Enrollment
625 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
7
States / cities
Gainesville, Florida • Boston, Massachusetts • Omaha, Nebraska + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 10, 2024 · Synced Sep 5, 2026, 8:59 AM EDT
Recruiting No phase listed Observational

Fatigue and Molecular Mechanisms in Cancer Patients Receiving CCRT

NCT06633224
View directory record Official record
Conditions
Cancer, Thoracic Cancer, Gynecologic Cancer, Head and Neck Cancer, Gastrointestinal Cancer
Interventions
Blood Specimen Collection, Stool Specimen Collection, Quality of Life (QOL) Questionnaires
Procedure · Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Sep 5, 2026, 8:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Dietary Sodium Supplementation on Growth & Intestinal Microbiome

NCT05546814
View directory record Official record
Conditions
Preterm Birth
Interventions
Sodium algorithm
Procedure
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
25 Weeks to 30 Weeks
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 10, 2025 · Synced Sep 5, 2026, 8:59 AM EDT