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ClinicalTrials.gov public records Last synced Oct 22, 2026, 12:32 AM EDT

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Showing 169–192 of 251 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool sample Clear all
Active, not recruiting Not applicable Interventional

DNA Sequencing in Clinical Practice, Mayo Clinic Health Tapestry Study

NCT05212428
View directory record Official record
Conditions
Genetic Disorder
Interventions
Biospecimen Collection, Diagnostic Laboratory Biomarker Analysis, Genetic Counseling, Questionnaire Administration
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
110,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2029
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Combinatorial Single Cell Strategies for a Crohn's Disease Gut Cell Atlas

NCT04113733
View directory record Official record
Conditions
Crohn Disease
Interventions
Sample Collection
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Oct 22, 2026, 12:32 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Black Raspberry Nectar for the Prevention of Lung Cancer, BE WELL Study

NCT04267874
View directory record Official record
Conditions
Lung Carcinoma, Tobacco-Related Carcinoma
Interventions
Biospecimen Collection, Nutritional Supplementation, Placebo Administration, Questionnaire Administration
Procedure · Dietary Supplement · Drug + 1 more
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
55 Years to 77 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 1, 2023 · Synced Oct 22, 2026, 12:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Variability in Microbial Response to Dietary Fiber

NCT06023940
View directory record Official record
Conditions
Microbial Colonization
Interventions
High fiber
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
45 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 24, 2024 · Synced Oct 22, 2026, 12:32 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 22, 2026, 12:32 AM EDT
Terminated No phase listed Observational

Stool Sample Collection Protocol for Development of Screening Test for Colorectal Cancer and Other Digestive Tract Cancers

NCT02503631
View directory record Official record
Conditions
Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Stool Sample Collection Kit
Device
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years to 90 Years
Enrollment
397 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2017
U.S. locations
21
States / cities
Newport Beach, California • Hamden, Connecticut • Holiday, Florida + 17 more
Source: ClinicalTrials.gov public record
Updated Apr 6, 2018 · Synced Oct 22, 2026, 12:32 AM EDT
Active, not recruiting No phase listed Observational

Exercise, Fitness and Tumor Profiling in Breast Cancer Patients

NCT03424915
View directory record Official record
Conditions
Breast Cancer
Interventions
Harvard Health Professionals survey, Blood draw, CPET Procedures, stool sample, Research Tissue sampling
Behavioral · Other · Procedure
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years to 80 Years · Female only
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

PyloPlus Urea Breath Test System Post Therapy Efficacy Confirmation Study

NCT05681689
View directory record Official record
Conditions
Helicobacter Pylori Infection, Post-Treatment, Efficacy
Interventions
PyloPlus UBT System, Histology, Rapid Urease Test, Comparator Breath Test, Stool Antigen Test
Combination Product · Diagnostic Test
Lead sponsor
ARJ Medical, Inc.
Industry
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
Doral, Florida • Union City, New Jersey
Source: ClinicalTrials.gov public record
Updated May 6, 2023 · Synced Oct 22, 2026, 12:32 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 22, 2026, 12:32 AM EDT
Completed Not applicable Interventional Results available

Examining Changes in Microbiota Over the Course of PTSD Treatment

NCT04109196
View directory record Official record
Conditions
Posttraumatic Stress Disorder, Depression
Interventions
Cognitive Processing Therapy
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 100 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 22, 2023 · Synced Oct 22, 2026, 12:32 AM EDT
Terminated No phase listed Observational Results available

Predictors of Tumor Response and of Radiation Therapy Side Effects in Patients With Gastrointestinal Cancers

NCT01445327
View directory record Official record
Conditions
Esophageal Cancer, Stomach Cancer, Pancreatic Cancer
Interventions
Specimen collection
Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 1, 2022 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational Results available

Imaging Biomarkers in Crohn's Associated Spondyloarthritis

NCT02709694
View directory record Official record
Conditions
Crohn's Disease, Spondyloarthritis
Interventions
No intervention
Other
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 25, 2021 · Synced Oct 22, 2026, 12:32 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

Genomic Resources for Enhancing Available Therapies (GREAT1.0) Study

NCT04306939
View directory record Official record
Conditions
Chronic Pancreatitis, Inflammatory Bowel Diseases, Hepatitis, NASH - Nonalcoholic Steatohepatitis, Acute Pancreatitis, Rheumatoid Arthritis, Diabetes Mellitus, Dyslipidemias, Multiple Sclerosis, Irritable Bowel Syndrome, Chronic Pain, Chronic Disease, Chronic Kidney Diseases, Crohn Disease, Celiac Disease, Biliary Cirrhosis, Bile Acid Synthesis Defect, Gastritis, Cholecystitis, Cholelithiases, IPMN, Cyst Pancreas, Cystic Fibrosis, Pancreatic Exocrine Insufficiency, Diarrhea Chronic, Constipation - Functional, Constipation Chronic Idiopathic
Interventions
venipuncture, Questionnaires, Additional Sample Collections
Other · Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
12 Years and older
Enrollment
120,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational

Functional Dyspepsia Microbiome Study

NCT02340312
View directory record Official record
Conditions
Functional Dyspepsia
Interventions
EGD, Collection of Stool Specimens
Procedure · Other
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
8 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 22, 2026, 12:32 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 20, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Li-Fraumeni Syndrome/TP53 Biobank

NCT04367246
View directory record Official record
Conditions
Li-Fraumeni Syndrome, Li-Fraumeni-Like Syndrome
Interventions
No Intervention
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
Not listed
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2029
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Phildelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Predicting Responsiveness in Oncology Patients Based on Host Response Evaluation During Anti Cancer Treatments, Using Multiomics

NCT05736029
View directory record Official record
Conditions
Non Small Cell Lung Cancer, Healthy
Interventions
blood, stool and tissue samples collection
Other
Lead sponsor
OncoHost Ltd.
Industry
Eligibility
18 Years and older
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Exact CRC Screening Test: Stool Sample Collection Study to Support Assay Validation Testing

NCT01600209
View directory record Official record
Conditions
Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Not listed
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
50 Years to 84 Years
Enrollment
674 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
13
States / cities
Tucson, Arizona • Pomona, California • San Diego, California + 10 more
Source: ClinicalTrials.gov public record
Updated May 13, 2015 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational

Close Assessment and Testing for Chronic Graft Versus Host Disease, CATCH Study

NCT04188912
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm
Interventions
Biospecimen Collection, Optical Coherence Tomography, Spirometry, Survey Administration, Digital Photography, Quality-of-Life Assessment, Medical Chart Review
Procedure · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
267 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
7
States / cities
Gainesville, Florida • Tampa, Florida • Bethesda, Maryland + 4 more
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced Oct 22, 2026, 12:32 AM EDT
Active, not recruiting No phase listed Observational

Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine Therapy

NCT03281902
View directory record Official record
Conditions
Advanced Breast Carcinoma, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma, Stage III Breast Cancer AJCC v7, Stage IIIA Breast Cancer AJCC v7, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 9, 2026 · Synced Oct 22, 2026, 12:32 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 22, 2026, 12:32 AM EDT
Suspended Phase 1 Interventional

The Immune Effects of Fermented Wheat Germ Nutritional Supplementation in Patients With Advanced Solid Tumor Cancers Being Treated With Standard of Care Checkpoint Inhibitors

NCT05967533
View directory record Official record
Conditions
Advanced Colorectal Carcinoma, Advanced Lung Non-Small Cell Carcinoma, Advanced Malignant Solid Neoplasm, Advanced Melanoma, Advanced Renal Cell Carcinoma, Advanced Triple-Negative Breast Carcinoma, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IV Breast Cancer (AJCC) v8, Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Stage III Colorectal Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage III Renal Cell Cancer AJCC v8, Stage IV Colorectal Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IV Renal Cell Cancer AJCC v8
Interventions
Fermented Wheat Germ Extract
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational

Collection of Blood, Urine, and Stool to Monitor MetastaticColorectal Cancers

NCT03563651
View directory record Official record
Conditions
Stage III Colorectal Cancer AJCC v8, Stage IIIA Colorectal Cancer AJCC v8, Stage IIIB Colorectal Cancer AJCC v8, Stage IIIC Colorectal Cancer AJCC v8, Stage IV Colorectal Cancer AJCC v8, Stage IVA Colorectal Cancer AJCC v8, Stage IVB Colorectal Cancer AJCC v8, Stage IVC Colorectal Cancer AJCC v8
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis, Questionnaire Administration
Procedure · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 18, 2021 · Synced Oct 22, 2026, 12:32 AM EDT
Completed No phase listed Observational

The Effect of the Microbiome on Immune Checkpoint Inhibitor Response in Melanoma Patients

NCT05102773
View directory record Official record
Conditions
Clinical Stage IV Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8
Interventions
Biospecimen Collection, Computed Tomography, Laboratory Biomarker Analysis, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Oct 22, 2026, 12:32 AM EDT