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ClinicalTrials.gov public records Last synced Oct 30, 2026, 10:23 AM EDT

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Showing 25–48 of 195 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool Samples Clear all
Completed No phase listed Observational

Oral Aromatase Inhibitors Modify the Gut Microbiome

NCT05030038
View directory record Official record
Conditions
Breast Cancer
Interventions
Fecal swab collection, Blood samples
Biological
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Pathobiomes in Gut of Critically Ill Patients

NCT06822465
View directory record Official record
Conditions
Pseudomonas Aeruginosa
Interventions
P. aeruginosa using in vitro and in vivo assays
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Hyde Park, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Terminated Phase 1 Interventional Results available

Fecal Microbiota Transplantation (FMT) of FMP30 in Relapsing-Remitting Multiple Sclerosis

NCT03594487
View directory record Official record
Conditions
Relapsing Remitting Multiple Sclerosis
Interventions
FMP30 Donor Stool, Fecal Microbiota Transplantation (FMT) of FMP30 Donor Stool, Observational Control
Drug · Procedure · Other
Lead sponsor
Jeffrey Gelfand
Other
Eligibility
18 Years to 60 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Oct 30, 2026, 10:23 AM 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 30, 2026, 10:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Inflammation, Diabetes, Ethnicity and Obesity Cohort

NCT03022682
View directory record Official record
Conditions
Obesity, Diabetes Mellitus, Pre Diabetes
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 75 Years
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2029
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Oct 30, 2026, 10:23 AM 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 30, 2026, 10:23 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 8, 2017 · Synced Oct 30, 2026, 10:23 AM 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 30, 2026, 10:23 AM 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 30, 2026, 10:23 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

A Non-Interventional Pilot Study to Explore the Role of Gut Flora in Disease

NCT04031469
View directory record Official record
Conditions
Gut Microbiome, Gastrointestinal Microbiome, Autism, Autism Spectrum Disorder, Autism Spectrum Disorder High-Functioning, Alzheimer Disease, Alzheimer Dementia (AD), Alzheimer Dementia, Alzheimer Disease (AD), Crohn, Crohn Colitis, Crohn Disease (CD), Crohn Disease Colon, Myalgic Encephalomyelitis, ME/CFS, Myalgic Encephalomyelitis (ME), Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, Psoriasis, Psoriasis Annularis, Psoriasis Chronic, Chronic Urinary Tract Infection, Ulcerative Colitis (Disorder), Ulcerative Colitis (UC), Ulcerative Colitis Acute, Ulcerative Colitis Chronic, Multiple Sclerosis, Multiple Sclerosis (MS) - Relapsing-remitting, Multiple Sclerosis (MS) Primary Progressive, Constipation Chronic Idiopathic, Constipation, Celiac, Celiac Disease, Celiac Sprue, Lyme Arthritis, Lyme Borreliosis, Nervous System, Lyme Disease, Chronic, Cholesterol, Cholesterol Level, High, Cancer, Colon Cancer, Amyotrophic Lateral Sclerosis (ALS), Amyotrophic Lateral Sclerosis, Rheumatoid Arthritis (RA), Rheumatoid Arthritis - Rheumatism, Chronic Fatigue Syndrome (CFS), PARKINSON DISEASE (Disorder), Parkinson Disease, Parkinson Disease (PD), Depression, Major Depressive Disorder (MDD), Depression Disorder, Depression in Adults, Anxiety, Anxiety Disorder Generalized, Obsessive Compulsive Disorder (OCD), Obsessive Compulsive Disorder OCD, Obsessive - Compulsive Disorder, Bipolar, Bipolar 1 Disorder, Bipolar Disorder (BD), Bipolar Disorder I and II, Bipolar and Related Disorders, Migraine, Migraine Disorder, Diabetes (DM), Diabetes, Lupus, Lupus Erythematosus, Epidermolysis Bullosa (EB), Mesothelioma, Mesothelioma Malignant, IBS (Irritable Bowel Syndrome), Irritable Bowel, IBS - Irritable Bowel Syndrome, Irritable Bowel Syndrome (IBS), Eczema, Eczema Atopic Dermatitis, Acne, Myasthaenia Gravis, Gout
Interventions
There is no intervention in this study
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
12 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2030
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Completed No phase listed Observational

Gastrointestinal Microbiome Influence on the Development of Bronchopulmonary Dysplasia

NCT03229967
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
16S rRNA stool microbiome sequencing.
Diagnostic Test
Lead sponsor
University of Tennessee
Other
Eligibility
0 Days to 7 Days
Enrollment
197 participants
Timeline
2017 – 2020
U.S. locations
2
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 10, 2023 · Synced Oct 30, 2026, 10:23 AM EDT
Completed Phase 1 Interventional

Neoantigen DNA Vaccine in Combination With Nivolumab/Ipilimumab and PROSTVAC in Metastatic Hormone-Sensitive Prostate Cancer

NCT03532217
View directory record Official record
Conditions
Metastatic Hormone-Sensitive Prostate Cancer
Interventions
PROSTVAC-V, PROSTVAC-F, Nivolumab, Ipilimumab, Neoantigen DNA vaccine, TriGrid Delivery System, Tumor biopsy, Peripheral blood, Fecal samples, Leukapheresis
Biological · Drug · Device + 1 more
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Male only
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Aug 5, 2022 · Synced Oct 30, 2026, 10:23 AM 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 30, 2026, 10:23 AM EDT
Recruiting Phase 4 Interventional

Zopa Retreatment and Vector Shedding in Adults With RRP

NCT06538480
View directory record Official record
Conditions
Recurrent Respiratory Papillomatosis, Papillomavirus Infection, Papillomaviridae
Interventions
Zopapogene imadenovec (Zopa)
Drug
Lead sponsor
Precigen, Inc
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
3
States / cities
Atlanta, Georgia • Bethesda, Maryland • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Oct 30, 2026, 10:23 AM EDT
Completed No phase listed Observational

Developing Self-Management Interventions After HCT

NCT03710031
View directory record Official record
Conditions
Hematopoietic Stem Cell Transplant (HSCT)
Interventions
PNS Tracking
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 9, 2021 · Synced Oct 30, 2026, 10:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Meals Study for Amyotrophic Lateral Sclerosis and Parkinson's Disease

NCT07625605
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis (ALS), Parkinson's Disease (PD)
Interventions
The MIND diet
Behavioral
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
30 Years and older
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
3
States / cities
Elizabethton, Tennessee • Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Not listed No phase listed Observational

Gut Microbiome and Ventricular Arrhythmias

NCT04466072
View directory record Official record
Conditions
Ventricular Tachycardia, Ventricular Fibrillation, Gut Microbiome
Interventions
Stool test for microbial analysis
Diagnostic Test
Lead sponsor
North Florida Foundation for Research and Education
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 18, 2022 · Synced Oct 30, 2026, 10:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Does a Periaqueductal Gray-vagus Nerve Interface Malfunction Explain the Nat hx With Its Numerous Co-morbidities?

NCT06616363
View directory record Official record
Conditions
POTS - Postural Orthostatic Tachycardia Syndrome
Interventions
Questionnaires to be competed, Provide list of medication and lifetime events, Use phone App to record new life events, Will wear an activity monitor, Periodic 24-hour urine sodium check, A fMRI scan, A bedside tilt test will be performed, IV placed to collect blood samples, Stool Sample
Behavioral · Device · Other + 1 more
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
12 Years to 21 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Comprehensive Outcomes for After Cancer Health

NCT05349227
View directory record Official record
Conditions
Ovarian Cancer, Breast Cancer, Lung Cancer, Gastric Cancer, Survivorship, Endometrial Cancer, Head and Neck Cancers, Prostate Cancers, Geriatric Oncology, Metastatic Breast Cancer, Metastatic Cancer
Interventions
Digital Health Coaching Program, Fitbit
Behavioral · Device
Lead sponsor
Pack Health
Industry
Eligibility
18 Years and older
Enrollment
625 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
7
States / cities
Gainesville, Florida • Boston, Massachusetts • Omaha, Nebraska + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 11, 2024 · Synced Oct 30, 2026, 10:23 AM EDT
Recruiting No phase listed Observational

Chronic Loose Stools Following Right-sided Hemicolectomy for Colon Cancer and the Association With Bile Acid Malabsorption and Small Intestinal Bacterial Overgrowth Using a Novel Sampling Device

NCT06927011
View directory record Official record
Conditions
Colon Cancer
Interventions
Capscan
Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
20 Years to 85 Years
Enrollment
20 participants
Timeline
2025 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Oct 30, 2026, 10:23 AM 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 30, 2026, 10:23 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Primary and Secondary Prevention of Type 2 Diabetes Mellitus in Clark County

NCT06387797
View directory record Official record
Conditions
At Risk for Type 2 Diabetes Mellitus, Pre Diabetes
Interventions
Cooking Matters for Adults (CMA)
Behavioral
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated May 1, 2026 · Synced Oct 30, 2026, 10:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessing Uniqueness of Inflammatory Bowel Disease Related Microbiome-derived Biomarkers

NCT05640583
View directory record Official record
Conditions
Irritable Bowel Disease
Interventions
Hygieacare System
Device
Lead sponsor
HyGIeaCare, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 27, 2023 · Synced Oct 30, 2026, 10:23 AM EDT
Terminated Phase 2 Interventional

Investigational Microbiota Restoration Therapeutic for Hepatic Encephalopathy

NCT04155099
View directory record Official record
Conditions
Hepatic Encephalopathy, Cirrhosis, Liver
Interventions
RBX7455, Placebo
Biological
Lead sponsor
Ochsner Health System
Other
Eligibility
18 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Jefferson, Louisiana
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Oct 30, 2026, 10:23 AM EDT