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ClinicalTrials.gov public records Last synced Oct 25, 2026, 8:58 PM EDT

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Showing 169–192 of 194 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Biospecimen Collection-Stool Clear all
Completed No phase listed Observational

Screening Tests in Detecting Colorectal Cancer

NCT00025025
View directory record Official record
Conditions
Colorectal Cancer
Interventions
sample testing
Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
65 Years to 80 Years
Enrollment
4,482 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
65
States / cities
Tuscon, Arizona • Oakland, California • Aurora, Colorado + 38 more
Source: ClinicalTrials.gov public record
Updated Jul 4, 2016 · Synced Oct 25, 2026, 8:58 PM EDT
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, 8:58 PM 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Withdrawn No phase listed Observational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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM 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, 8:58 PM EDT
Active, not recruiting No phase listed Observational

A Pilot Study of Blood-based Biomarkers for Response to Immune Checkpoint Inhibitors

NCT06630429
View directory record Official record
Conditions
Non-Small Cell Lung Cancer, Renal Cell Carcinoma (RCC)
Interventions
Biospecimen Collection
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
100 participants
Timeline
2020 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 25, 2026, 8:58 PM EDT
Recruiting Phase 1 Interventional

Role of Gut Microbiome and Fecal Transplant on Medication-Induced GI Complications in Patients With Cancer

NCT03819296
View directory record Official record
Conditions
Clinical Stage 0 Cutaneous Melanoma AJCC v8, Clinical Stage I Cutaneous Melanoma AJCC v8, Clinical Stage IA Cutaneous Melanoma AJCC v8, Clinical Stage IB Cutaneous Melanoma AJCC v8, Clinical Stage II Cutaneous Melanoma AJCC v8, Clinical Stage IIA Cutaneous Melanoma AJCC v8, Clinical Stage IIB Cutaneous Melanoma AJCC v8, Clinical Stage IIC Cutaneous Melanoma AJCC v8, Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Colitis, Lung Non-Small Cell Carcinoma, Malignant Genitourinary System Neoplasm, Malignant Solid Neoplasm, Pathologic Stage 0 Cutaneous Melanoma AJCC v8, Pathologic Stage I Cutaneous Melanoma AJCC v8, Pathologic Stage IA Cutaneous Melanoma AJCC v8, Pathologic Stage IB Cutaneous Melanoma AJCC v8, Pathologic Stage II Cutaneous Melanoma AJCC v8, Pathologic Stage IIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIC Cutaneous Melanoma AJCC v8, Pathologic Stage III Cutaneous Melanoma AJCC v8, Pathologic Stage IIIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIIC Cutaneous Melanoma AJCC v8, Pathologic Stage IIID Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8, Stage 0 Lung Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
Interventions
Best Practice, Biospecimen Collection, Endoscopic Procedure, Fecal Microbiota Transplantation, Infliximab, Laboratory Biomarker Analysis, Prednisone, Vedolizumab
Other · Procedure · Biological + 1 more
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Oct 25, 2026, 8:58 PM EDT
Recruiting No phase listed Observational

The APS Phenotyping Study

NCT06521502
View directory record Official record
Conditions
ARDS, Sepsis, Pneumonia
Interventions
Blood collection, Urine Collection, Nasal, oral, and rectal swabs, Stool collection, Heat Moisture Exchange Filter collection, Tracheal Aspirate sample collection, Non-bronchoscopic bronchoalveolar lavage (NBBAL), Surveys, Short physical performance battery, Hand grip strength, CNS Vital Signs, Muscle Ultrasound, Muscle Strength, Spirometry, Lung Diffusion Testing (DLCO), Chest CT Scan
Other · Procedure · Radiation
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
4,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
20
States / cities
Fresno, California • Palo Alto, California • San Francisco, California + 12 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2026 · Synced Oct 25, 2026, 8:58 PM 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 25, 2026, 8:58 PM EDT
Completed No phase listed Observational

Risk of Chemotherapy Toxicity in Older Patients With Blood Cancer or Non-small Cell Lung Cancer

NCT05106374
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Lung Non-Small Cell Carcinoma
Interventions
Biospecimen Collection, Cognitive Assessment, Physical Performance Testing, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
60 Years and older
Enrollment
182 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 25, 2026, 8:58 PM EDT
Completed No phase listed Observational

Blood and Stool Sample Collection in Subjects With a Diagnosis of Colorectal Cancer or Colorectal Lesion: Act Fast

NCT03789162
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Not listed
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years and older
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
44
States / cities
Phoenix, Arizona • Canoga Park, California • Chula Vista, California + 39 more
Source: ClinicalTrials.gov public record
Updated Jun 29, 2025 · Synced Oct 25, 2026, 8:58 PM EDT
Suspended Not applicable Interventional

Effects of Home Gluten Immunogenic Peptide Testing on Children With Celiac Disease

NCT03462979
View directory record Official record
Conditions
Celiac Disease, Gluten Sensitivity, Gluten Enteropathy, Gastrointestinal Disease, Digestive System Disease, Diet Modification, Intestinal Disease, Malabsorption Syndromes, Patient Compliance, Diagnostic Self Evaluation, Quality of Life
Interventions
Immunochromatographic lateral flow test
Device
Lead sponsor
Boston Children's Hospital
Other
Eligibility
6 Years to 18 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 20, 2022 · Synced Oct 25, 2026, 8:58 PM EDT