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ClinicalTrials.gov public records Last synced Oct 19, 2026, 4:54 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 265–288 of 310 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Stool collection Clear all
Completed No phase listed Observational

Sample Collection Study to Evaluate DNA Markers in Subjects With Inflammatory Bowel Disease (IBD)

NCT02503696
View directory record Official record
Conditions
Inflammatory Bowel Disease, Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Stool Collection Kit
Device
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
18 Years to 84 Years
Enrollment
697 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
27
States / cities
Dothan, Alabama • La Jolla, California • Mission Hills, California + 24 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2016 · Synced Oct 19, 2026, 4:54 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome of Donor Iron Deficient Study

NCT02990988
View directory record Official record
Conditions
Iron Deficiency
Interventions
Not listed
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 75 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 19, 2022 · Synced Oct 19, 2026, 4:54 PM EDT
Recruiting No phase listed Observational

Natural History Study of Patients With Succinic Semialdehyde Dehydrogenase (SSADH) Deficiency

NCT03758521
View directory record Official record
Conditions
Succinic Semialdehyde Dehydrogenase Deficiency
Interventions
Transcranial magnetic stimulation (TMS), Magnetic resonance imaging (MRI), Electroencephalogram (EEG), Bio-specimen Collection
Device · Procedure
Lead sponsor
Boston Children's Hospital
Other
Eligibility
Not listed
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Oct 19, 2026, 4:54 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Fecal Microbiota Transplantation in Pediatric Patients

NCT02108821
View directory record Official record
Conditions
Inflammatory Bowel Diseases (IBD), Crohn's Disease (CD), Ulcerative Colitis (UC)
Interventions
Fecal Microbiota Transplantation (FMT)
Biological
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
2 Years to 22 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 4, 2021 · Synced Oct 19, 2026, 4:54 PM EDT
Recruiting Not applicable Interventional

Strategies for Optimizing a Mailed FIT Program in Appalachia

NCT07173985
View directory record Official record
Conditions
Colonic Neoplasms
Interventions
Standard FIT kit, Enhanced FIT kit, Telephone patient navigation, Text message patient navigation
Behavioral
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
45 Years to 74 Years
Enrollment
550 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 19, 2026, 4:54 PM EDT
Terminated Phase 2 Interventional Results available

Dose Ranging Study of the Safety and Efficacy of Orally Administered Lyophilized Fecal Microbiota Product (PRIM-DJ2727) for the Treatment of Recurrent Clostridium Difficile Infection (CDI)

NCT03298048
View directory record Official record
Conditions
Recurrent C. Difficile Infection
Interventions
Low fecal microbiota dose, Mid fecal microbiota dose, High fecal microbiota dose
Biological
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 100 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 6, 2020 · Synced Oct 19, 2026, 4:54 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Efficacy of Fecal Immunochemical Test Using Digital Rectal Exam

NCT03013855
View directory record Official record
Conditions
Fecal Immunochemical Test
Interventions
FIT-SOC, FIT-DRE
Device
Lead sponsor
Boston Medical Center
Other
Eligibility
50 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 31, 2017 · Synced Oct 19, 2026, 4:54 PM 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 19, 2026, 4:54 PM EDT
Recruiting No phase listed Observational

Prospective Evaluation of Chronic Pancreatitis for Epidemiologic and Translational Studies

NCT03099850
View directory record Official record
Conditions
Pancreatitis
Interventions
Data Management and Monitoring
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years to 75 Years
Enrollment
2,345 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2030
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Oct 19, 2026, 4:54 PM EDT
Recruiting Phase 2 Interventional

A Clinical Trial of Soluble Fiber for Asthma

NCT06372249
View directory record Official record
Conditions
Asthma in Children
Interventions
Inulin
Drug
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
6 Years to 17 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 4, 2026 · Synced Oct 19, 2026, 4:54 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 19, 2026, 4:54 PM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Advancing Prevention of Pulmonary Fibrosis

NCT04564183
View directory record Official record
Conditions
IPF, Pulmonary Fibrosis, ILD
Interventions
Sample collection, Questionnaires, High resolution CT scan of the chest, Pulmonary Function Test
Other · Radiation · Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 75 Years
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 25, 2025 · Synced Oct 19, 2026, 4:54 PM EDT
Completed Not applicable Interventional

Incomplete Follow Up After Positive FIT or Stool DNA Testing: A Multimethod Approach

NCT03817905
View directory record Official record
Conditions
Positive FIT or Stool DNA Testing Follow up
Interventions
Patient navigator
Other
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
40 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 15, 2025 · Synced Oct 19, 2026, 4:54 PM EDT
Completed Phase 1 Interventional

Vitamin D Regulation of Gut Specific B Cells and Antibodies Targeting Gut Bacteria in Inflammatory Bowel Disease

NCT04828031
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Ulcerative Colitis, Crohn Disease
Interventions
Vitamin D
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Oct 19, 2026, 4:54 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 19, 2026, 4:54 PM 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 10, 2022 · Synced Oct 19, 2026, 4:54 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 19, 2026, 4:54 PM EDT
Recruiting Not applicable Interventional

Effect of Meal Timing During Cancer Treatment in Patients in Alaska: A Randomized Clinical Trial

NCT06802172
View directory record Official record
Conditions
Rectal Cancer Stage II, Rectal Cancer Stage III, Breast Cancer Stage I, Rectal Cancer Stage IV, Breast Cancer Stage II, Breast Cancer Stage III, Solid Tumor Cancer
Interventions
Time-restricted eating, Questionnaire Administration, Biospecimen Collection, Health coaching
Behavioral · Other · Procedure
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
21 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 19, 2026, 4:54 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Pilot Study Assessing Intestinal Microbiota Diversification and Changes After Travel to South(East) Asia From the US

NCT03043300
View directory record Official record
Conditions
Dysbiosis
Interventions
Screening Criteria Review, Pre-Travel Questionnaire, Pre-Travel Stool Specimen Collection, Short-Term Post-Travel Questionnaire, Short-Term Post-Travel Stool Specimen Collection, Long-Term Post-Travel Questionnaire, Long-Term Post-Travel Stool Specimen Collection
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 30, 2019 · Synced Oct 19, 2026, 4:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Scavenging of Reactive Carbonyl Species by Blueberries in Humans

NCT07873723
View directory record Official record
Conditions
Human Health, Reactive Carbonyl Species, Polyphenols
Interventions
Blueberries, control group
Dietary Supplement
Lead sponsor
North Carolina Agriculture & Technical State University
Other
Eligibility
25 Years to 70 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 14, 2026 · Synced Oct 19, 2026, 4:54 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The BEACH Interview Study- Pregnant and Breastfeeding Mothers

NCT03036696
View directory record Official record
Conditions
Pediatric Obesity, Recruitment
Interventions
Pregnant Mothers Interview, Breastfeeding Mothers Interview
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Aug 12, 2019 · Synced Oct 19, 2026, 4:54 PM 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 12, 2023 · Synced Oct 19, 2026, 4:54 PM EDT
Terminated Not applicable Interventional

Blood and Stool Molecular Biomarkers Longitudinal Detection Study in Crohn's Disease (CD) Patients

NCT03566407
View directory record Official record
Conditions
Crohn's Disease
Interventions
Colonoscopy
Procedure
Lead sponsor
Prometheus Laboratories
Industry
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
5
States / cities
Los Angeles, California • Ventura, California • Hamden, Connecticut + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2019 · Synced Oct 19, 2026, 4:54 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 19, 2026, 4:54 PM EDT