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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Stool samples Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial Investigating if Antibiotic Use in the First 48 Hours of Life Adversely Impacts the Preterm Infant Microbiome

NCT02477423
View directory record Official record
Conditions
Premature Birth of Newborn, Enterocolitis, Necrotizing
Interventions
Ampicillin, Gentamicins, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
Up to 6 Hours
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 7, 2020 · Synced Sep 6, 2026, 1:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Acidophilus Pearls Fecal Recovery Study

NCT02001610
View directory record Official record
Conditions
Survival of Probiotics During GI Transit, GI Symptoms
Interventions
Acidophilus pearls, Hard shell gelatin capsules
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Sep 6, 2026, 1:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Adherence to Minimally Invasive Testing

NCT02251782
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Epi proColon Test, Fecal Immunochemical Test (FIT)
Device
Lead sponsor
Epigenomics, Inc
Industry
Eligibility
50 Years to 76 Years
Enrollment
490 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
2
States / cities
Portland, Oregon • Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 29, 2015 · Synced Sep 6, 2026, 1:51 AM EDT
Active, not recruiting No phase listed Observational

Microbiome and Immunosuppression: The Mission Study

NCT04953715
View directory record Official record
Conditions
Kidney Transplant Rejection, Kidney Transplant
Interventions
collection of body microbiome
Other
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2033
U.S. locations
2
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 6, 2026 · Synced Sep 6, 2026, 1:51 AM 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 14, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Effects of Adding Chickpeas to the American Diet (Long Term Study)

NCT02375373
View directory record Official record
Conditions
Inflammation
Interventions
Observational Chickpea Diet
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 75 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 18, 2016 · Synced Sep 6, 2026, 1:51 AM EDT
Withdrawn No phase listed Observational

Study SBX-01-101: A Stool Collection Study in Colorectal Cancer (CRC) Patients Treated With Irinotecan-Based Regimens

NCT05821582
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Stool Collection and Survey Completion
Other
Lead sponsor
Sanguine Biosciences
Industry
Eligibility
18 Years to 85 Years
Timeline
2023
U.S. locations
1
States / cities
Woburn, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Sep 6, 2026, 1:51 AM EDT
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 3, 2016 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting 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 Apr 4, 2024 · Synced Sep 6, 2026, 1:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Human Microbiome in Immune-Mediated Diseases

NCT02394964
View directory record Official record
Conditions
Autoimmune
Interventions
Sample Collection
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2023
U.S. locations
2
States / cities
New Haven, Connecticut • New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 20, 2023 · Synced Sep 6, 2026, 1:51 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Stomach Cancer Early Detection and Prevention With Endoscopy

NCT05566899
View directory record Official record
Conditions
Gastric Cancer
Interventions
esophagogastroduodenoscopy (EGD)
Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
40 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Sep 6, 2026, 1:51 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Aspirin in Preventing Colorectal Cancer in Patients With Colorectal Adenoma

NCT02965703
View directory record Official record
Conditions
Colorectal Adenoma, Colorectal Carcinoma
Interventions
Aspirin, Biospecimen Collection, Placebo Administration, Questionnaire Administration, Rectal Biopsy
Drug · Procedure · Other
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Terminated No phase listed Observational

Gut Microbiome in Fecal Samples From Patients With Metastatic Cancer Undergoing Chemotherapy or Immunotherapy

NCT02960282
View directory record Official record
Conditions
Metastatic Carcinoma, Stage IV Colorectal Cancer, Stage IVA Colorectal Cancer, Stage IVB Colorectal Cancer
Interventions
Biospecimen Collection, Laboratory Biomarker Analysis
Procedure · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 9, 2022 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting Not applicable Interventional

Lifestyle and Recurrent Clostridioides Difficile Infection (CDI)

NCT07613645
View directory record Official record
Conditions
Clostridioides Difficile Infection
Interventions
Health counseling sessions, Diet (control diet), Diet (experimental diet)
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Enrolling by invitation No phase listed Observational

Physiologic and Functional Adaptations of Insulin Sensitive Tissues

NCT03407833
View directory record Official record
Conditions
Diabetes, Insulin Resistance, Obesity, Bariatric Surgery Candidate, Roux-en-y Gastric Bypass, Liver Diseases
Interventions
Endoscopy biopsy, Surgical biopsy, Mixed-meal tolerance test, Excised Liver Tissue Sampling
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 6, 2026, 1:51 AM EDT
Not yet recruiting Not applicable Interventional

Study to Understand Relationship Between Gut Health and Toxicities of Hormonal Breast Cancer Treatment

NCT07553234
View directory record Official record
Conditions
Breast Cancer
Interventions
Stool Sampling, Chia Seeds
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting No phase listed Observational

Study to Detect Changes in Urinary and Gut Microbiome During Androgen Deprivation Therapy and Radiation Therapy in Patients With Prostate Cancer

NCT04775355
View directory record Official record
Conditions
Stage I Prostate Cancer AJCC v7, Stage II Prostate Cancer AJCC v7, Stage IIA Prostate Cancer AJCC v7, Stage IIB Prostate Cancer AJCC v7, Stage III Prostate Cancer AJCC v7, Stage IV Prostate Cancer AJCC v7
Interventions
Biospecimen Collection, Electronic Health Record Review, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Metabolome and Microbiomic in Fecal Samples

NCT00938028
View directory record Official record
Conditions
Infant
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
12 Months to 20 Months
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 20, 2009 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting No phase listed Observational

Assess Diversity of Gut Microbiome in Met NSCLC in Correlation to Tx & Adverse Effects

NCT06221800
View directory record Official record
Conditions
Non Small Cell Lung Cancer
Interventions
Microbiome
Diagnostic Test
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 6, 2026, 1:51 AM 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 16, 2025 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting No phase listed Observational

Evaluating the Association Among Changes in Gut Microbiome, Fatigue, and Chemotherapy-Induced Nausea in Early Stage Breast Cancer

NCT05417867
View directory record Official record
Conditions
Chemotherapy-Related Nausea and/or Vomiting, Early Stage Breast Carcinoma, Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8
Interventions
Biospecimen Collection, Questionnaire Administration
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
5
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Albert Lea, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting No phase listed Observational

Biospecimen and Medical Data Collection and Tumor Biopsy in Creating Research Tissue Registry in Patients With Inflammatory or Invasive Breast Cancer

NCT00477100
View directory record Official record
Conditions
Inflammatory Breast Carcinoma, Invasive Breast Carcinoma, Second Primary Malignant Neoplasm
Interventions
Biospecimen Collection, Interview, Medical Chart Review, Questionnaire Administration
Procedure · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
1,200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2030
U.S. locations
10
States / cities
Gilbert, Arizona • La Jolla, California • Greeley, Colorado + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Identifying and Characterizing Preclinical MS

NCT05787795
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
biological samples
Other
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2033
U.S. locations
1
States / cities
North Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 6, 2026, 1:51 AM EDT
Recruiting Not applicable Interventional

Fiber Supplementation in Heart Failure With Preserved Ejection Fraction (HFpEF)

NCT06337812
View directory record Official record
Conditions
Type2diabetes, Heart Failure With Preserved Ejection Fraction
Interventions
Potato Starch
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 6, 2026, 1:51 AM EDT