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ClinicalTrials.gov public records Last synced Oct 25, 2026, 4:38 AM EDT

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

Showing 217–240 of 251 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: stool sample Clear all
Not yet recruiting Phase 2 Interventional

Isotretinoin vs. Doxycycline for Acneiform Rash in Patients Receiving Drugs That Target the MAPK Pathway

NCT07629167
View directory record Official record
Conditions
Acneiform Drug Eruption, Acneiform Eruptions
Interventions
Isotretinoin, Doxycycline, Blood specimen collection, Photographs of Rash, Questionnaires, Stool Specimen collection
Drug · Procedure · Other + 1 more
Lead sponsor
University of California, San Francisco
Other
Eligibility
12 Years to 39 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Withdrawn No phase listed Observational

Diet, Physical Activity and Body Composition Changes During R-CHOP

NCT04293900
View directory record Official record
Conditions
Non-Hodgkin Lymphoma, DLBCL, Diffuse Large B Cell Lymphoma
Interventions
24-hour dietary recall, Hand grip strength, International Physical Activity Questionnaire, Patient-reported outcomes survey, Pittsburgh Sleep Quality Index, Functional Assessment of Cancer Treatment - Lymphoma, urine sample (optional), fecal sample (optional)
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 25, 2026, 4:38 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Gut Microbiome Studies in Patients With POEMS Syndrome and Other Plasma Cell Disorders

NCT06252948
View directory record Official record
Conditions
Plasma Cell Disorders
Interventions
Non-interventional study (observational)
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Recruiting No phase listed Observational

Predictive Biomarkers for Pneumonitis After Chemoradiotherapy and Immunotherapy in Patients With Non-small Cell Lung Cancer

NCT04913311
View directory record Official record
Conditions
Lung Non-Small Cell Carcinoma
Interventions
Biospecimen Collection, Bronchoscopy with Bronchoalveolar Lavage, Chemoradiotherapy, Computed Tomography, Diagnostic Laboratory Biomarker Analysis, Immune Checkpoint Inhibitor, Nasal Wash and Collection, Quality-of-Life Assessment, Questionnaire Administration, Spirometry
Procedure · Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Completed Not applicable Interventional

Effect of Ketone Esters in Parkinson's Disease

NCT04477161
View directory record Official record
Conditions
Parkinson Disease, Ketosis
Interventions
Ketone Ester Elite endurance Nutrition Drink, Stool Sample
Dietary Supplement · Other
Lead sponsor
University of Florida
Other
Eligibility
40 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 4, 2022 · Synced Oct 25, 2026, 4:38 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 25, 2026, 4:38 AM EDT
Terminated Not applicable Interventional

MOlecular BIomarkers and Adherent and Invasive Escherichia Coli (AIEC) Detection Study In Crohn's Disease Patients

NCT02882841
View directory record Official record
Conditions
Crohn's Disease
Interventions
Biopsies, stool and blood collection
Other
Lead sponsor
Enterome
Industry
Eligibility
18 Years to 75 Years
Enrollment
143 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 12, 2018 · Synced Oct 25, 2026, 4:38 AM EDT
Terminated No phase listed Observational

Gut Microbiome and Depression

NCT05808101
View directory record Official record
Conditions
Multiple Sclerosis, Depression
Interventions
Neuro-QoL T-score determination
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 13, 2024 · Synced Oct 25, 2026, 4:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Pill

NCT07243756
View directory record Official record
Conditions
Healthy
Interventions
3D-printed ingestible pill
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Study of Human Brain-Gut Axis and Gut Microbiome in Patients With Brain Lesions - Repository for Neuroscience Research

NCT06117930
View directory record Official record
Conditions
Malignant Central Nervous System Neoplasm
Interventions
Non-Interventional Study
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 25, 2026, 4:38 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 25, 2026, 4:38 AM EDT
Not yet recruiting Early Phase 1 Interventional

Pilot Trial of Xylitol for C. Difficile De-Colonization in Patients With Inflammatory Bowel Disease

NCT06799039
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD), Clostridioides Difficile Infection
Interventions
Xylitol
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
69 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Oct 25, 2026, 4:38 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 25, 2026, 4:38 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Microbicide Safety and Acceptability in Young Men

NCT01283360
View directory record Official record
Conditions
High Risk MSM, HIV Negative, 18-30 Years of Age
Interventions
HEC Placebo Gel, Tenofovir 1% Gel
Other · Drug
Lead sponsor
CONRAD
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
249 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
2
States / cities
Boston, Massachusetts • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 28, 2015 · Synced Oct 25, 2026, 4:38 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Vagal Nerve Stimulation for Gastroparesis

NCT03120325
View directory record Official record
Conditions
Gastroparesis
Interventions
Vagal Nerve Stimulation
Device
Lead sponsor
Stanford University
Other
Eligibility
21 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Redwood City, California
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Oct 25, 2026, 4:38 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 25, 2026, 4:38 AM EDT
Active, not recruiting Not applicable Interventional

Abnormal Food Timing and Circadian Dyssynchrony in Alcohol Induced Colon Carcinogenesis

NCT03955510
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Right time eating, Delayed time eating, Sigmoidoscopy, Optional 24h circadian assessment in the Biological Rhythms lab, Alcohol
Other · Procedure
Lead sponsor
Rush University Medical Center
Other
Eligibility
21 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Withdrawn Not applicable Interventional

Comparison of Rectal Trumpet and Standard Care

NCT00307476
View directory record Official record
Conditions
Fecal Incontinence
Interventions
Rusch Nasopharyngeal Airway
Device
Lead sponsor
Christiana Care Health Services
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
2
States / cities
Newark, Delaware • Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Feb 13, 2023 · Synced Oct 25, 2026, 4:38 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 25, 2026, 4:38 AM EDT
Recruiting Not applicable Interventional

Sustained Oral Fiber Supplementation for Patients Undergoing Treatment for Hematological Malignancies

NCT04829136
View directory record Official record
Conditions
Hematopoietic and Lymphatic System Neoplasm
Interventions
Kate Farms 1.0, Standard of Care Nutritional Support, Survey Administration, Dietary Supplement, Biospecimen Collection, Electronic Health Record Review, Fiber and Dietary Assessments
Dietary Supplement · Other · Procedure
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Terminated No phase listed Observational

Volatiles in Exhaled Breath and Blood in Crohn's Disease: Validation Cohort

NCT02641171
View directory record Official record
Conditions
Crohn's Disease
Interventions
Specimen sampling
Other
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 12, 2018 · Synced Oct 25, 2026, 4:38 AM EDT
Recruiting No phase listed Observational

Clinical Microbial Species & Antibiotic Resistance ID in ED Patients Presenting With Infection - is Rapid ID Possible & Accurate?

NCT01904188
View directory record Official record
Conditions
Sepsis, Systemic Inflammatory Response Syndrome, Infection Mixed, Infection, Bacterial, Infection, Fungal, Infection, Coronavirus, Antibiotic Resistance Genes, Human Genome Analysis
Interventions
Gene Z or other rapid diagnostic techniques developed in our lab (as of 2018 not using Gene Z - now using In-Dx along with other developed techniquesregularly)
Device
Lead sponsor
Michigan State University
Other
Eligibility
18 Years and older
Enrollment
2,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2032
U.S. locations
2
States / cities
Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 25, 2026, 4:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Analyzing IBS to Identify Biomarkers and Microbiome Signatures

NCT02419963
View directory record Official record
Conditions
Diarrhoea Predominant Irritable Bowel Syndrome, IBS
Interventions
endoscopy for tissue biopsy, Blood Sample, Stool Sample
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 7, 2017 · Synced Oct 25, 2026, 4:38 AM EDT
Not listed No phase listed Observational

Stool Sample Collection Study

NCT06294873
View directory record Official record
Conditions
Colorectal Cancer
Interventions
A screening device for the detection of colorectal and other aerodigestive tract cancers
Diagnostic Test
Lead sponsor
Innovis LLC
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
3
States / cities
Anaheim, California • Ocala, Florida • Cordova, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 6, 2024 · Synced Oct 25, 2026, 4:38 AM EDT