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ClinicalTrials.gov public records Last synced Oct 24, 2026, 5:33 AM EDT

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Showing 1–24 of 251 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: stool sample Clear all
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 24, 2026, 5:33 AM EDT
Terminated Phase 2 Interventional

Gluten Free Diet in Diminishing Side Effects Patients With Acute Myeloid Leukemia Undergoing Induction Chemotherapy

NCT03108911
View directory record Official record
Conditions
Acute Myeloid Leukemia
Interventions
Best Practice, Biospecimen Collection, Dietary Intervention, Laboratory Biomarker Analysis
Other · Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 17, 2017 · Synced Oct 24, 2026, 5:33 AM EDT
Recruiting Phase 2 Interventional

Robotic Cytoreduction and Hyperthermic Intraperitoneal Chemotherapy for Treatment of Gastric Cancer With Limited Peritoneal Metastasis, ROBO-CHIP Study

NCT05753306
View directory record Official record
Conditions
Gastric Adenocarcinoma, Gastroesophageal Junction Adenocarcinoma, Metastatic Malignant Neoplasm in the Peritoneum
Interventions
Cisplatin, Computed Tomography, Gastrectomy, Magnetic Resonance Imaging, Positron Emission Tomography, Questionnaire Administration, Paclitaxel, Hyperthermic Intraperitoneal Chemotherapy
Drug · Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2030
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Oct 24, 2026, 5:33 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 24, 2026, 5:33 AM EDT
Recruiting No phase listed Observational

Study to Detect Changes in Urinary and Gut Microbiome During Androgen Deprivation Therapy and Radiation Therapy in Patients With Prostate Cancer

NCT04775355
View directory record Official record
Conditions
Stage I Prostate Cancer AJCC v7, Stage II Prostate Cancer AJCC v7, Stage IIA Prostate Cancer AJCC v7, Stage IIB Prostate Cancer AJCC v7, Stage III Prostate Cancer AJCC v7, Stage IV Prostate Cancer AJCC v7
Interventions
Biospecimen Collection, Electronic Health Record Review, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 24, 2026, 5:33 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 24, 2026, 5:33 AM EDT
Completed No phase listed Observational

Schizophrenia and the Gut Microbiome

NCT02921243
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Not listed
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 64 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 19, 2019 · Synced Oct 24, 2026, 5:33 AM EDT
Completed Not applicable Interventional Results available

Safety of Stool Transplant for Patients With Difficult to Treat C. Difficile Infection

NCT02770326
View directory record Official record
Conditions
C. Difficile Infection, Cancer
Interventions
Fecal Microbiota Transplantation (FMT)
Biological
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2025 · Synced Oct 24, 2026, 5:33 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Pulse Consumption, Gut Microbiome, and Appetite in Healthy Participants

NCT07043712
View directory record Official record
Conditions
Microbial Colonization, Metabolic Syndrome
Interventions
High pulse consumption
Dietary Supplement
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
20 Years to 55 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Oct 24, 2026, 5:33 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 11, 2024 · Synced Oct 24, 2026, 5:33 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Rheumatology Patient Registry and Biorepository

NCT04402086
View directory record Official record
Conditions
Rheumatic Diseases, Adult Onset Still Disease, Ankylosing Spondylitis, Psoriatic Arthritis, Reactive Arthritis, Antiphospholipid Syndrome, Systemic Lupus Erythematosus, Behcet Disease, Dermatomyositis, Polymyositis, Giant Cell Arteritis, Lyme Disease, Mixed Connective Tissue Disease, Polymyalgia Rheumatica, Rheumatoid Arthritis, Sarcoidosis, Systemic Sclerosis, Scleroderma, Sjogren's Syndrome, Undifferentiated Connective Tissue Diseases
Interventions
Not listed
Lead sponsor
Yale University
Other
Eligibility
18 Years to 99 Years
Enrollment
5,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 13, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Volatile Organic Compounds (VOCs) in Active Inflammatory Bowel Disease

NCT04827368
View directory record Official record
Conditions
IBD, Crohn Disease, Ulcerative Colitis
Interventions
Breath Test
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
Completed Phase 2 Interventional

Probiotics for Clostridium Difficile Infection in Older Adults

NCT01680874
View directory record Official record
Conditions
Clostridium Difficile
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 3, 2015 · Synced Oct 24, 2026, 5:33 AM EDT
Suspended No phase listed Observational

Role of Pancreatic Exocrine Secretion in Weight Gain After Pancreas Transplantation

NCT04690738
View directory record Official record
Conditions
Exocrine Pancreatic Insufficiency, Weight Gain
Interventions
Fecal Elastase Concentration
Diagnostic Test
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Oct 24, 2026, 5:33 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 24, 2026, 5:33 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Gallotannins on the Gut Microbiome and How it Affects Inflammatory Markers Among Obese Individuals.

NCT07505212
View directory record Official record
Conditions
Obesity (Disorder)
Interventions
Gallotannin-rich mango, Lactiplantibacillus pentosus (probiotic), No Treatment Added
Dietary Supplement · Other
Lead sponsor
Prairie View A&M University
Other
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Prairie View, Texas
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

ARGONAUT: Stool and Blood Sample Bank for Cancer Patients

NCT04638751
View directory record Official record
Conditions
Non-small Cell Lung Cancer, Colorectal Cancer, Triple Negative Breast Cancer, Pancreas Cancer
Interventions
Immunotherapy, Chemotherapy, CRC surgical resection, Colonoscopy
Drug · Procedure
Lead sponsor
Persephone Biosciences
Industry
Eligibility
18 Years and older
Enrollment
5,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
10
States / cities
Orange, California • San Diego, California • Miami, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
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 18, 2022 · Synced Oct 24, 2026, 5:33 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

the Effectiveness of a Weight Management Program in Patients Who Have Completed Treatment for Endometrial Cancer

NCT03908996
View directory record Official record
Conditions
Endometrial Cancer, Overweight
Interventions
Profile by Sanford weight management plan
Behavioral
Lead sponsor
Sanford Health
Other
Eligibility
18 Years and older · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
2
States / cities
Fargo, North Dakota • Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Mar 18, 2021 · Synced Oct 24, 2026, 5:33 AM EDT
Completed No phase listed Observational

Sample Collection Study to Evaluate DNA Markers in Subjects With Inflammatory Bowel Disease (IBD)

NCT02503696
View directory record Official record
Conditions
Inflammatory Bowel Disease, Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Stool Collection Kit
Device
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
18 Years to 84 Years
Enrollment
697 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
27
States / cities
Dothan, Alabama • La Jolla, California • Mission Hills, California + 24 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2016 · Synced Oct 24, 2026, 5:33 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

User Testing of the Evivo Screening Test

NCT03601936
View directory record Official record
Conditions
Gut Microbiome
Interventions
Evivo Infant Gut Bifidobacterium Screening Test
Device
Lead sponsor
Evolve BioSystems, Inc.
Industry
Eligibility
Up to 6 Months
Enrollment
231 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
5
States / cities
Los Angeles, California • Marietta, Georgia • Gresham, Oregon + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 23, 2019 · Synced Oct 24, 2026, 5:33 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 38000: Study of Responses to Vaccination With Typhoid and/or Cholera

NCT03705585
View directory record Official record
Conditions
Typhoid and/or Cholera Vaccination
Interventions
Vivotif Typhoid Oral Vaccine, Vaxchora
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

A Cross-sectional Partnership to Improve Prevention and Health Equity Among African Americans

NCT05903885
View directory record Official record
Conditions
Colorectal Cancer, Prevention
Interventions
On-site Fecal Immunochemical Test (FIT) Kit Distribution, On-site With Social Media Advertising Fecal Immunochemical Test (FIT) Kit Distribution
Other
Lead sponsor
University of Nebraska
Other
Eligibility
45 Years to 75 Years
Enrollment
1,200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
2
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 24, 2026, 5:33 AM EDT
Active, not recruiting No phase listed Observational

Hypoglycemia and the Gut Microbiome

NCT03385707
View directory record Official record
Conditions
Hypoglycemia
Interventions
Not listed
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 24, 2026, 5:33 AM EDT