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ClinicalTrials.gov public records Last synced Oct 10, 2026, 2:07 PM EDT

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Showing 121–144 of 179 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool and blood collection Clear all
Completed Early Phase 1 Interventional

Effects of Probiotics on the Gut Microbiome and Immune System in Operable Stage I-III Breast or Lung Cancer

NCT04857697
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Breast Adenocarcinoma, Stage I Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8
Interventions
Biopsy, Biospecimen Collection, Probiotic, Therapeutic Conventional Surgery
Procedure · Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 21, 2023 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT
Completed No phase listed Observational

Study Assessing Risk Factors for Abdominal Pain in Children With Inflammatory Bowel Disease

NCT02984059
View directory record Official record
Conditions
Inflammatory Bowel Disease
Interventions
Genomic DNA, RNA analysis, Microbiome, Calprotectin, Pain questionnaires, Anxiety/Depression Questionnaires
Genetic · Other
Lead sponsor
Connecticut Children's Medical Center
Other
Eligibility
8 Years to 18 Years
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Hartford, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 8, 2019 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 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 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT
Active, not recruiting Not applicable Interventional

High-Fermented Food Intervention Among Locally Advanced Rectal Cancer Patients (The FEED Trial)

NCT06337552
View directory record Official record
Conditions
Rectal Cancer, Non-Small Cell Lung Cancer
Interventions
FEED-FF, Standard of Care (SUC)
Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Sep 23, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Recruiting No phase listed Observational

Longitudinal Evaluation of Microbial and Host Signatures During Immunotherapy for Lung Cancer

NCT04063501
View directory record Official record
Conditions
Lung Cancer
Interventions
Bronchoscopy, Research Procedures
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 100 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Oct 10, 2026, 2:07 PM EDT
Terminated No phase listed Observational

Monitoring of Immune and Microbial Reconstitution in (HCT) and Novel Immunotherapies

NCT03557749
View directory record Official record
Conditions
Immune and Microbial Reconstitution, Systemic Viral Infection, Acute-graft-versus-host Disease, Chronic Graft-versus-host-disease, Recurrent Malignancy, Cytokine Release Syndrome, Allogenic Related Donors, Cell Therapy/Immunotherapy Patients
Interventions
Blood Sample, Stool Sample, Urine Sample, Bronchoalveolar Lavage (BAL) fluid, Gastrointestinal biopsy x 2-4, Skin biopsy, Skin, mouth, and/or ocular swab, Apheresis Product, Final cellular product
Diagnostic Test
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
Not listed
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 21, 2023 · Synced Oct 10, 2026, 2:07 PM 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 10, 2026, 2:07 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 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT
Recruiting No phase listed Observational

Clonal Hematopoiesis Chemotherapy and Radiation Effects Study

NCT07675967
View directory record Official record
Conditions
Lung Cancer (Diagnosis), Osteochondroma, Spitz Nevus, Solid Cancers, Breast Cancer, Gastric (Stomach) Cancer, Colorectal (Colon or Rectal) Cancer, Sarcoma, Ovarian Adenocarcinoma, Uterine Adenocarcinoma, Endometrial Adenocarcinoma, Esophageal Adenocarcinoma, Head and Neck Cancer, Therapy-Related Acute Myeloid Leukemia, Therapy-Related MDS, Clonal Hematopoiesis of Indeterminate Potential (CHIP), Clonal Cytopenia of Undetermined Significance
Interventions
Samples
Other
Lead sponsor
Dana-Farber Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
5,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2035
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT
Completed No phase listed Observational

Cytokines and Genes in Therapeutic Response in Crohn's Disease

NCT03266471
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Baseline blood sample, Baseline intestinal biopsies, Crohn's disease activity index (CDAI), Post treatment blood sample, Post treatment intestinal biopsies, Baseline stool sample, Post treatment stool sample
Diagnostic Test · Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 14, 2023 · Synced Oct 10, 2026, 2:07 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Mechanisms of Hypoglycemia in Patients Without Diabetes

NCT04428723
View directory record Official record
Conditions
Hypoglycemia
Interventions
Entry of demographic and medical history data into a deidentified database, Blood sample for DNA analysis, Stool sample for microbiome analysis, Mixed meal tolerance test, Continuous glucose monitoring, activity monitor
Other · Genetic · Diagnostic Test
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 70 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT
Suspended Not applicable Interventional

Ketogenic Dietary Intervention to Improve Response to Immunotherapy in Patients With Metastatic Melanoma and Metastatic Kidney Cancer

NCT06391099
View directory record Official record
Conditions
Clinical Stage IV Cutaneous Melanoma AJCC v8, Metastatic Cutaneous Melanoma, Metastatic Renal Cell Carcinoma, Stage IV Renal Cell Cancer AJCC v8
Interventions
Best Practice, Biospecimen Collection, Computed Tomography, Dietary Intervention, Educational Activity, Glucose Measurement, Ketone Measurement, Questionnaire Administration
Other · Procedure
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Oct 10, 2026, 2:07 PM EDT
Enrolling by invitation Phase 4 Interventional Accepts healthy volunteers

Imaging Biomarkers of Pancreatic Function and Disease

NCT05659147
View directory record Official record
Conditions
Pancreatitis, Diabetes Mellitus
Interventions
Research MRI without administration of intravenous secretin, Research MRI with administration of intravenous secretin, Genetic Sequencing, Blood Tests, Stool Tests, Survey Completion, Endoscopic pancreatic function tests (ePFTs), Secretin
Diagnostic Test · Genetic · Other + 1 more
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
5 Years to 21 Years
Enrollment
195 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 PM 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 10, 2026, 2:07 PM EDT
Terminated No phase listed Observational

Associations Between Chemotherapy-Induced Nausea in Patients With Genitourinary, Sarcoma or Melanoma Cancers and Changes in Gut Microbiome: Potential for Precision Therapeutics

NCT05819827
View directory record Official record
Conditions
Bladder Cancer, Prostate Cancer, Testicular Cancer, Bladder Carcinoma, Genitourinary System Carcinoma, Malignant Testicular Neoplasm, Melanoma, Prostate Carcinoma, Sarcoma
Interventions
Blood and Tissue
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years and older
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 27, 2025 · Synced Oct 10, 2026, 2:07 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 10, 2026, 2:07 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 10, 2026, 2:07 PM EDT