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ClinicalTrials.gov public records Last synced Oct 24, 2026, 5:05 PM EDT

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Showing 73–96 of 194 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Biospecimen Collection-Stool Clear all
Completed No phase listed Observational

Evaluating Modifiable Biomarkers for the Prediction of Immunotherapy Response and Toxicity

NCT04954885
View directory record Official record
Conditions
Lung Non-Squamous Non-Small Cell Carcinoma, Stage IIIB Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
Interventions
Biospecimen Collection, Physical Performance Testing, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Oct 24, 2026, 5:05 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Role of Gut Microbiota in Hypertension

NCT02188381
View directory record Official record
Conditions
Hypertension
Interventions
Stool Sample and Blood Sample
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 80 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 17, 2025 · Synced Oct 24, 2026, 5:05 PM EDT
Completed Not applicable Interventional Results available

Evaluation of the Immune Response to Clostridium Difficile in Adults With Clostridium Difficile Infection (CDI)

NCT01716533
View directory record Official record
Conditions
Infections, Clostridium Difficile
Interventions
Blood sampling, Stool sample collection
Procedure · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
3
States / cities
Little Rock, Arkansas • Boston, Massachusetts • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 7, 2019 · Synced Oct 24, 2026, 5:05 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Mechanisms of Post-Bariatric Hypoglycemia

NCT04428866
View directory record Official record
Conditions
Hypoglycemia
Interventions
Continuous Glucose Monitoring, activity monitor, Mixed meal tolerance test, Glucagon Sensitivity Testing, Hypoglycemic Hyperinsulinemic Clamp, analysis of fecal microbiome
Diagnostic Test
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 70 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 5, 2024 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Human Skin and Gut Mycobiome and Bacteriome Comprehensive Registry

NCT05196061
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Questionnaire, Stool sample, Skin swab, Oral rinse
Other
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
18 Years and older
Enrollment
5,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Active, not recruiting Phase 2 Interventional Results available

TRADE: Dose Escalation Tolerability of Abemaciclib in HR+ HER2- Early Stage Breast Cancer

NCT06001762
View directory record Official record
Conditions
Breast Cancer, Early-stage Breast Cancer, High Risk Breast Carcinoma
Interventions
Abemaciclib, Tamoxifen, Anastrozole, Letrozole, Exemestane, LHRH Agonist
Drug
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
12
States / cities
Stamford, Connecticut • Brewer, Maine • Scarborough, Maine + 7 more
Source: ClinicalTrials.gov public record
Updated Jul 2, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Parkinson's Disease Biomarkers in Nerve Cells in the Gut

NCT05347407
View directory record Official record
Conditions
Parkinson Disease
Interventions
Colonoscopy
Procedure
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
45 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 22, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Completed No phase listed Observational

Immune Response Under Immunotherapy in Metastatic NSCLC: Sputum, Blood Samples and Microbioata Study

NCT04804137
View directory record Official record
Conditions
Non-squamous Lung Cancer, Metastatic Lung Cancer
Interventions
Blood, sputum, saliva, stool
Other
Lead sponsor
University Hospital, Tours
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 17, 2024 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Evaluation of Geriatric Assessment and Management for Older Adults With Non-small Cell Lung Cancer Receiving Chemotherapy Radiation Therapy

NCT06139627
View directory record Official record
Conditions
Lung Non-Small Cell Carcinoma, Stage III Lung Cancer AJCC v8
Interventions
Best Practice, Biospecimen Collection, Communication Intervention, Comprehensive Geriatric Assessment, Electronic Health Record Review, Survey Administration
Other · Procedure
Lead sponsor
City of Hope Medical Center
Other
Eligibility
60 Years and older
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2031
U.S. locations
3
States / cities
Duarte, California • Rochester, New York • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Healthy Volunteers Study

NCT06962059
View directory record Official record
Conditions
Ovarian Cancer, Genetic Predisposition to Disease
Interventions
Self-Administered Sample Collection
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
30 Years to 50 Years · Female only
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational

COVID-19 Transmission and Morbidity in Malawi

NCT05973084
View directory record Official record
Conditions
SARS CoV 2 Infection, SARS CoV 2 Vaccination
Interventions
Not listed
Lead sponsor
Boston University
Other
Eligibility
5 Years to 75 Years
Enrollment
1,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 28, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Completed Not applicable Interventional

A Plant-Based Whole-Foods Meal Delivery Service for Patients With Multiple Myeloma Undergoing Autologous Hematopoietic Cell Transplant

NCT06559709
View directory record Official record
Conditions
Multiple Myeloma
Interventions
Biospecimen Collection, Dietary Intervention, Medical Chart Review, Questionnaire Administration
Procedure · Other
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 8, 2025 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Sample Collection From Healthy Volunteers for Assay Optimization

NCT03538600
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years to 80 Years
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2043
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 21, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Withdrawn Not applicable Interventional

The Effect of Yogurt in Cancer Patient With Moderate Gastrointestinal (GI) Symptoms

NCT03177681
View directory record Official record
Conditions
Malignant Neoplasms of Independent (Primary) Multiple Sites
Interventions
Tongue Assessment, Stool Sample, Questionnaires, Holter Monitor, Yogurt
Other · Behavioral · Device
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced Oct 24, 2026, 5:05 PM EDT
Not listed Not applicable Interventional

Gastrointestinal Microbiome Study of Appendiceal Cancer

NCT02599116
View directory record Official record
Conditions
Pseudomyxoma Peritonei, Appendiceal Neoplasm, Cancer, Appendiceal
Interventions
Bio-specimen collection, Questionnaire
Other
Lead sponsor
Mercy Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2024
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 27, 2023 · Synced Oct 24, 2026, 5:05 PM EDT
Enrolling by invitation No phase listed Observational

Development and Analysis of a Stool Bank for Cancer Patients

NCT04291755
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung, Carcinoma, Colorectal
Interventions
Pembrolizumab Injection
Drug
Lead sponsor
Persephone Biosciences
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
2
States / cities
Fountain Valley, California • Winter Haven, Florida
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational

Collecting Blood and Stool Samples to Detect Colorectal Cancer or Advanced Neoplasia in Lynch Syndrome Patients

NCT05410977
View directory record Official record
Conditions
Colorectal Carcinoma, Lynch Syndrome
Interventions
Biospecimen Collection, Electronic Health Record Review
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
950 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
9
States / cities
Scottsdale, Arizona • San Francisco, California • Aurora, Colorado + 5 more
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

BÜHLMANN fCAL™ ELISA - Aid in Differentiation of IBD From IBS

NCT02351635
View directory record Official record
Conditions
Inflammatory Bowel Disease, Irritable Bowel Syndrome
Interventions
fecal calprotectin level
Other
Lead sponsor
Bühlmann Laboratories AG
Industry
Eligibility
22 Years and older
Enrollment
478 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
7
States / cities
Palo Alto, California • Miami, Florida • Macon, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Jan 18, 2019 · Synced Oct 24, 2026, 5:05 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Blood Samples to Identify Biomarkers in Patients Treated With Cyclophosphamide After Donor Stem Cell Transplant

NCT04160390
View directory record Official record
Conditions
Allogeneic Hematopoietic Stem Cell Transplant Recipient, Donor, Malignant Neoplasm
Interventions
Biospecimen Collection-Blood, Biospecimen Collection-Stool
Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2027
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Oct 24, 2026, 5:05 PM 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 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational

Biospecimen Collection to Identify Gene Mutations for High Risk Pancreatic Cancer in Pediatric Patients, INSPPIRE 2 Study

NCT06651580
View directory record Official record
Conditions
Chronic Pancreatitis, Exocrine Pancreas Carcinoma, Recurrent Acute Pancreatitis
Interventions
Biospecimen Collection, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Up to 17 Years
Enrollment
1,600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
22
States / cities
Los Angeles, California • Oakland, California • Palo Alto, California + 17 more
Source: ClinicalTrials.gov public record
Updated Sep 11, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Recruiting No phase listed Observational

Collection of Research Data and Samples From Patients Treated With Immunotherapy to Study Its Side Effects

NCT04242095
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Immune System Disorder, Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Medical Chart Review
Procedure · Other
Lead sponsor
Alliance for Clinical Trials in Oncology
Other
Eligibility
Not listed
Enrollment
2,240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
629
States / cities
Anchorage, Alaska • Fairbanks, Alaska • Kingman, Arizona + 405 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 24, 2026, 5:05 PM EDT
Terminated Not applicable Interventional Results available

Gut Microbiome & Gastrointestinal Toxicities as Determinants of Response to Neoadjuvant Chemo for Advanced Breast Cancer

NCT02696759
View directory record Official record
Conditions
Breast Cancer
Interventions
Blood & Fecal Collection
Other
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older · Female only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Mar 16, 2022 · Synced Oct 24, 2026, 5:05 PM EDT
Suspended Not applicable Interventional

Probiotics for the Prevention of Immunotherapy Induced Colitis in Patients Receiving Immunotherapy

NCT06508034
View directory record Official record
Conditions
Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Live Freeze-Dried Lactic Acid Bacteria Probiotic, Questionnaire Administration
Procedure · Dietary Supplement · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Oct 24, 2026, 5:05 PM EDT