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ClinicalTrials.gov public records Last synced Oct 17, 2026, 5:35 PM EDT

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Showing 97–120 of 204 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool Specimen Collection Clear all
Recruiting Not applicable Interventional

Low-Count Quantitative SPECT for Men Treated With Radium-223

NCT07221825
View directory record Official record
Conditions
Prostate Cancer, Cancer of the Prostate
Interventions
Low-count quantitative single-photon emission computed tomography imaging
Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Male only
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 15, 2026 · Synced Oct 17, 2026, 5:35 PM EDT
Completed No phase listed Observational

A Pilot Study of Influenza Viruses Isolated From Immunocompromised Children and Adolescents

NCT02352389
View directory record Official record
Conditions
Influenza, Human
Interventions
Blood sample, Nasal swab, Oropharyngeal swab, Stool sample, Symptom checklist
Other
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
Up to 21 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 12, 2023 · Synced Oct 17, 2026, 5:35 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 17, 2026, 5:35 PM EDT
Recruiting Not applicable Interventional

Heart Rate Variability and Inflammatory Bowel Disease

NCT06537258
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
Biofeedback Enhanced Treatment
Behavioral
Lead sponsor
Emory University
Other
Eligibility
13 Years to 18 Years
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Oct 17, 2026, 5:35 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ketogenic Diet Health and Longevity

NCT05939011
View directory record Official record
Conditions
Ketogenic Dieting, Ketoses, Metabolic, Ketosis
Interventions
Well-formulated Ketogenic Diet
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
30 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Oct 17, 2026, 5:35 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

An Evaluation of a Multi-target Stool DNA (Mt-sDNA) Test, Cologuard, for CRC Screening in Individuals Aged 45-49 and at Average Risk for Development of Colorectal Cancer: Act Now

NCT03728348
View directory record Official record
Conditions
Colorectal Cancer
Interventions
mt-sDNA screening test, Colonoscopy
Diagnostic Test · Procedure
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
45 Years to 49 Years
Enrollment
983 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
39
States / cities
Phoenix, Arizona • Camarillo, California • Laguna Hills, California + 35 more
Source: ClinicalTrials.gov public record
Updated Jun 4, 2021 · Synced Oct 17, 2026, 5:35 PM EDT
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 17, 2026, 5:35 PM 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 17, 2026, 5:35 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Elucidation of Breast Milk Composition and Structure Over the First Year of Lactation: UC Davis Lactation Study

NCT01817127
View directory record Official record
Conditions
Healthy, Gestational Diabetes Mellitus, Type 2 Diabetes Mellitus
Interventions
Not listed
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
395 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2028
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 17, 2026, 5:35 PM EDT
Active, not recruiting No phase listed Observational

Metagenomic Evaluation of the Gut Microbiome in Patients With Lynch Syndrome and Other Hereditary Colonic Polyposis Syndromes

NCT02371135
View directory record Official record
Conditions
Lynch Syndrome, Hereditary Colonic Polyposis Syndromes
Interventions
colonic biopsies, questionnaires
Genetic
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 17, 2026, 5:35 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 17, 2026, 5:35 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 17, 2026, 5:35 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 17, 2026, 5:35 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 17, 2026, 5:35 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Impact of Proton Pump Inhibitors on the Fecal Microbiome

NCT01822977
View directory record Official record
Conditions
Healthy, Clostridium Difficile Infection
Interventions
omeprazole
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 20, 2014 · Synced Oct 17, 2026, 5:35 PM EDT
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 17, 2026, 5:35 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 17, 2026, 5:35 PM EDT
Recruiting Phase 1 Interventional

Testing an Immunotherapy Anti-cancer Drug, Nivolumab, for Advanced Cancers in Patients With Autoimmune Disorders, AIM-NIVO

NCT03816345
View directory record Official record
Conditions
Autoimmune Disease, Crohn Disease, Dermatomyositis, Hematopoietic and Lymphoid Cell Neoplasm, Inflammatory Bowel Disease, Malignant Solid Neoplasm, Multiple Sclerosis, Psoriasis, Psoriatic Arthritis, Rheumatoid Arthritis, Sjogren Syndrome, Systemic Lupus Erythematosus, Systemic Scleroderma, Ulcerative Colitis
Interventions
Biospecimen Collection, Cabozantinib, Fluoropyrimidine, Ipilimumab, Nivolumab, Platinum Compound, Platinum Doublet
Procedure · Drug · Biological
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
51
States / cities
Birmingham, Alabama • Palo Alto, California • Sacramento, California + 37 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 17, 2026, 5:35 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Blood Collection Sub-Study of Exact Sciences Protocol 2019-01: "Clinical Validation of an Optimized Multi-Target Stool DNA (Mt-sDNA 2.0) Test, For Colorectal Cancer Screening BLUE-C"

NCT04144751
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Blood Sample Collection
Other
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years and older
Enrollment
23,494 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
194
States / cities
Birmingham, Alabama • Cullman, Alabama • Dothan, Alabama + 160 more
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 17, 2026, 5:35 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Host Immune Response to Clostridium Difficile Infection in Inflammatory Bowel Disease Patients

NCT01813500
View directory record Official record
Conditions
Crohn's Disease, Ulcerative Colitis, Clostridium Difficile, Inflammatory Bowel Disease
Interventions
Blood and stool sample
Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 26, 2017 · Synced Oct 17, 2026, 5:35 PM EDT
Completed No phase listed Observational

Functional Dyspepsia Microbiome Study

NCT02340312
View directory record Official record
Conditions
Functional Dyspepsia
Interventions
EGD, Collection of Stool Specimens
Procedure · Other
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
8 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 17, 2026, 5:35 PM 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 17, 2026, 5:35 PM EDT
Recruiting No phase listed Observational

Kinetic Analysis of Immune Cells in Blood and Chronic Graft-Versus-Host Disease-Affected Tissues After Allogeneic Hematopoietic Cell Transplantation

NCT07235501
View directory record Official record
Conditions
Graft Versus Host Disease, Hematopoietic and Lymphatic System Neoplasm, Malignant Solid Neoplasm
Interventions
Non-Interventional Study
Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
7 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 17, 2026, 5:35 PM EDT
Recruiting No phase listed Observational

Norris ORIEN Total Cancer Care

NCT02970045
View directory record Official record
Conditions
Cancer Risk, Malignant Neoplasm
Interventions
Biospecimen Collection, Evaluation of Cancer Risk Factors, Medical Chart Review, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
10,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2037
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Oct 17, 2026, 5:35 PM EDT