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ClinicalTrials.gov public records Last synced Oct 31, 2026, 11:29 PM EDT

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Showing 97–120 of 195 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool Samples Clear all
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 31, 2026, 11:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Volatile Organic Compounds (VOCs) in Active Inflammatory Bowel Disease

NCT04827368
View directory record Official record
Conditions
IBD, Crohn Disease, Ulcerative Colitis
Interventions
Breath Test
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 70 Years
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Oct 31, 2026, 11:29 PM EDT
Completed No phase listed Observational

Microbiome Changes in Severe Burns

NCT03130868
View directory record Official record
Conditions
Burns Greater Than 20% BSAB, Burns
Interventions
Characterizing changes in the microbiome
Other
Lead sponsor
HealthPartners Institute
Other
Eligibility
17 Years to 120 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 1, 2018 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Multilevel Intervention Based on Colorectal Cancer (CRC) and Cervical Cancer Self-screening in Rural, Segregated Areas

NCT04471194
View directory record Official record
Conditions
Colorectal Cancer Screening, Cervical Cancer Screening
Interventions
Self-sampling HPV test, Fecal occult blood test
Diagnostic Test
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
50 Years to 65 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 13, 2022 · Synced Oct 31, 2026, 11:29 PM EDT
Completed No phase listed Observational

Hormonal Influences on Inflammatory Bowel Diseases

NCT05610527
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Contraception, Menstrual Problem
Interventions
Proposed study design and randomization scenarios, Repeated measures of validated Inflammatory Bowel Disease Patient Reported Outcome Instruments, Inflammatory marker collection and assessment for correlation with PRO responses and menstrual timing
Other
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 17, 2026 · Synced Oct 31, 2026, 11:29 PM EDT
Withdrawn No phase listed Observational

Diet, Physical Activity and Body Composition Changes During R-CHOP

NCT04293900
View directory record Official record
Conditions
Non-Hodgkin Lymphoma, DLBCL, Diffuse Large B Cell Lymphoma
Interventions
24-hour dietary recall, Hand grip strength, International Physical Activity Questionnaire, Patient-reported outcomes survey, Pittsburgh Sleep Quality Index, Functional Assessment of Cancer Treatment - Lymphoma, urine sample (optional), fecal sample (optional)
Other
Lead sponsor
George Washington University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 31, 2026, 11:29 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Tissue Repository: CTCL Collection Protocol

NCT02840747
View directory record Official record
Conditions
Lymphoma, T-Cell, Cutaneous, Lymphomatoid Papulosis, Sézary Syndrome
Interventions
Not listed
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Stool Microbiome Using HyGIeaCare Prep

NCT04264923
View directory record Official record
Conditions
Stool Microbiome
Interventions
HyGIeaCare Prep
Other
Lead sponsor
HyGIeaCare, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 31, 2020 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Results available

Examining Changes in Microbiota Over the Course of PTSD Treatment

NCT04109196
View directory record Official record
Conditions
Posttraumatic Stress Disorder, Depression
Interventions
Cognitive Processing Therapy
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 100 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 22, 2023 · Synced Oct 31, 2026, 11:29 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 31, 2026, 11:29 PM 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 7, 2026 · Synced Oct 31, 2026, 11:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

AI-EMERGE: Development and Validation of a Multi-analyte, Blood-based Colorectal Cancer Screening Test

NCT03688906
View directory record Official record
Conditions
Colo-rectal Cancer, Cancer Colon, Cancer, Rectum, Neoplasms,Colorectal, Polyps, Polyp of Colon, Adenoma, Adenoma Colon
Interventions
Not listed
Lead sponsor
Freenome Holdings Inc.
Industry
Eligibility
18 Years and older
Enrollment
3,275 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
29
States / cities
Huntsville, Alabama • Chandler, Arizona • Tucson, Arizona + 25 more
Source: ClinicalTrials.gov public record
Updated Mar 2, 2022 · Synced Oct 31, 2026, 11:29 PM EDT
Recruiting No phase listed Observational

Predictive Biomarkers for Pneumonitis After Chemoradiotherapy and Immunotherapy in Patients With Non-small Cell Lung Cancer

NCT04913311
View directory record Official record
Conditions
Lung Non-Small Cell Carcinoma
Interventions
Biospecimen Collection, Bronchoscopy with Bronchoalveolar Lavage, Chemoradiotherapy, Computed Tomography, Diagnostic Laboratory Biomarker Analysis, Immune Checkpoint Inhibitor, Nasal Wash and Collection, Quality-of-Life Assessment, Questionnaire Administration, Spirometry
Procedure · Other · Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Not listed
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Investigation of the Ability of a Supplement to Increase Good Bacteria in the Human Intestine and Blood Sugar Levels

NCT01944904
View directory record Official record
Conditions
Pre-diabetic
Interventions
Sugar Pill, XOS 2.8
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 70 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 1, 2017 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Particle Size Project

NCT05091801
View directory record Official record
Conditions
Test if Increased Chewing Will Increased Microbiota SCFA Production
Interventions
Intervention
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 14, 2022 · Synced Oct 31, 2026, 11:29 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Establishing a Diagnostic and Therapeutic Index in Autism Spectrum Disorder (ASD) and Fragile X Syndrome

NCT04869930
View directory record Official record
Conditions
Autism Spectrum Disorder, Fra(X) Syndrome
Interventions
specimen collection
Other
Lead sponsor
Nova Mentis Life Science Corp
Industry
Eligibility
6 Months to 21 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Oct 13, 2021 · Synced Oct 31, 2026, 11:29 PM EDT
Not listed No phase listed Observational

Gut Permeability-related Inflammation and Cardiovascular Disease Risk in Normal-weight and Metabolically Healthy Obesity

NCT05308394
View directory record Official record
Conditions
Obesity
Interventions
No experimental intervention will take place - the study is cross-sectional. Each participant will provide biological samples.
Other
Lead sponsor
Oklahoma State University
Other
Eligibility
18 Years to 50 Years
Enrollment
80 participants
Timeline
2022
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 15, 2022 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Dietary Sodium Supplementation on Growth & Intestinal Microbiome

NCT05546814
View directory record Official record
Conditions
Preterm Birth
Interventions
Sodium algorithm
Procedure
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
25 Weeks to 30 Weeks
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 11, 2025 · Synced Oct 31, 2026, 11:29 PM EDT
Completed Not applicable Interventional

Dietary Optimization of Microbiome Recovery Following Fecal Microbiota Transplantation

NCT05826418
View directory record Official record
Conditions
Recurrent Clostridium Difficile Infection, Fecal Microbiota Transplant
Interventions
MEND diet, mNICE diet
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 12, 2025 · Synced Oct 31, 2026, 11:29 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 31, 2026, 11:29 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

High-Resolution Measurements of Diet-Microbiome Interactions

NCT07856823
View directory record Official record
Conditions
IBS (Irritable Bowel Syndrome)
Interventions
Inulin, Low-fiber control breakfast shake, Atmo Gas-Sensing Capsule, CapScan Regional Fluid-Sampling Capsule
Dietary Supplement · Other · Device
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 31, 2026, 11:29 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 31, 2026, 11:29 PM EDT
Recruiting No phase listed Observational

Microbiome in Head and Neck Squamous Cell Carcinoma

NCT05837221
View directory record Official record
Conditions
Head and Neck Cancer, Lip Cancer, Oral Cancer, Pharynx Cancer
Interventions
Metagenomic sequencing, Metabolic analysis
Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 100 Years
Enrollment
60 participants
Timeline
2025 – 2028
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 31, 2026, 11:29 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Restoration of Antibiotics Related Infant Microbiota Perturbations by Autologous Fecal Transplant

NCT06609980
View directory record Official record
Conditions
Antibiotic Treatment
Interventions
autologous fecal matter transplant
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
1 Month to 4 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Oct 31, 2026, 11:29 PM EDT