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Showing 1–24 of 55 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: stool biomarkers Clear all
Withdrawn No phase listed Observational

Assessment of Septin9 Biomarker for Detection of Colorectal Cancer in Patients With Positive Fecal Immunochemical Test

NCT01574677
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Not listed
Lead sponsor
Epigenomics, Inc
Industry
Eligibility
49 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2012
U.S. locations
2
States / cities
Atlanta, Georgia • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 3, 2014 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational

Stool Collection Sub-Study of Exact Sciences Protocol 2018-01

NCT04473625
View directory record Official record
Conditions
Colorectal Cancer, Colo-rectal Cancer, Cancer
Interventions
Stool Sample Collection
Other
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
18 Years and older
Enrollment
291 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
12
States / cities
Tucson, Arizona • Hot Springs, Arkansas • Little Rock, Arkansas + 9 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2022 · Synced Sep 4, 2026, 10:58 AM 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 16, 2026 · Synced Sep 4, 2026, 10:58 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Randomized, Double-Blind Study to Assess the Effect of a Postbiotic on Oxidative Stress and Exercise Performance

NCT06795425
View directory record Official record
Conditions
Oxidative Stress, Healthy, Exercise-induced Muscle Damage, Exercise-induced Muscle Soreness, Immune Function, Gut Health, Microbiome Analysis, Exercise Performance, Exercise Metabolism
Interventions
Postbiotic Active Lifestyle Blend, Placebo
Dietary Supplement · Other
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Sep 4, 2026, 10:58 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 4, 2026, 10:58 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Effects of Triphala and VSL#3 Probiotic Supplementation on Stool Microbiome Profiles and Inflammation

NCT03907501
View directory record Official record
Conditions
Human Microbiome
Interventions
Synbiotic, Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
65 Years and older
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Sep 4, 2026, 10:58 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 4, 2026, 10:58 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Personalized Lifestyle Intervention for Improving Functional Health Outcomes Using N-of-1 Tent-Umbrella-Bucket Design

NCT04005456
View directory record Official record
Conditions
Health, Subjective, Gastrointestinal Dysfunction, Cardiovascular Risk Factor, Autoimmune Diseases, Dental Diseases, Hormone Disturbance, Neurocognitive Dysfunction
Interventions
Supplements and/or medical foods, Behavioral change support program, Food plan
Dietary Supplement · Behavioral · Other
Lead sponsor
Metagenics, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2022
U.S. locations
1
States / cities
Gig Harbor, Washington
Source: ClinicalTrials.gov public record
Updated Oct 29, 2023 · Synced Sep 4, 2026, 10:58 AM EDT
Recruiting Not applicable Interventional

Testing the Impact of Measurement-Based Care on Quality of Life and Disease Management Among Veterans With Inflammatory Bowel Disease

NCT07210580
View directory record Official record
Conditions
Inflammatory Bowel Disease
Interventions
MBC-IBD Intervention, Enhanced Treatment as Usual (E-TAU)
Behavioral · Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
4
States / cities
Decatur, Georgia • Ann Arbor, Michigan • Portland, Oregon + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Sep 4, 2026, 10:58 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Biomarkers of Intestinal Fibrosis in Small Bowel Crohn's Disease

NCT04088773
View directory record Official record
Conditions
Crohn Disease
Interventions
blood biomarkers, stool biomarkers, MRI imaging
Diagnostic Test
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
8 Years to 70 Years
Enrollment
232 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
4
States / cities
Atlanta, Georgia • Ann Arbor, Michigan • Rochester, Minnesota + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 12, 2025 · Synced Sep 4, 2026, 10:58 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Exogenous and Endogenous Risk Factors for Early-onset Colorectal Cancer

NCT05732623
View directory record Official record
Conditions
Colorectal Cancer, Early Onset Colorectal Cancer, Diet Habit, Risk Reduction
Interventions
Semi Quantitative Food Frequency Questionnaire (SQFFQ)
Behavioral
Lead sponsor
San Raffaele University
Other
Eligibility
18 Years to 49 Years
Enrollment
2,300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2035
U.S. locations
2
States / cities
Denver, Colorado • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational

Collection of Blood, Urine, and Stool to Monitor MetastaticColorectal Cancers

NCT03563651
View directory record Official record
Conditions
Stage III Colorectal Cancer AJCC v8, Stage IIIA Colorectal Cancer AJCC v8, Stage IIIB Colorectal Cancer AJCC v8, Stage IIIC Colorectal Cancer AJCC v8, Stage IV Colorectal Cancer AJCC v8, Stage IVA Colorectal Cancer AJCC v8, Stage IVB Colorectal Cancer AJCC v8, Stage IVC Colorectal Cancer AJCC v8
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis, Questionnaire Administration
Procedure · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 17, 2021 · Synced Sep 4, 2026, 10:58 AM EDT
Active, not recruiting No phase listed Observational

Genetic Analysis in Blood and Tumor Samples From Patients With Advanced or Metastatic Estrogen Receptor Positive and HER2 Negative Breast Cancer Receiving Palbociclib and Endocrine Therapy

NCT03281902
View directory record Official record
Conditions
Advanced Breast Carcinoma, Locally Advanced Breast Carcinoma, Metastatic Breast Carcinoma, Recurrent Breast Carcinoma, Stage III Breast Cancer AJCC v7, Stage IIIA Breast Cancer AJCC v7, Stage IIIB Breast Cancer AJCC v7, Stage IIIC Breast Cancer AJCC v7, Stage IV Breast Cancer AJCC v6 and v7
Interventions
Biopsy, Biospecimen Collection, Laboratory Biomarker Analysis
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 4, 2026, 10:58 AM EDT
Completed Not applicable Interventional

Salvia Hispanica Seed in Reducing Risk of Disease Recurrence in Patients With Non-Hodgkin Lymphoma

NCT02652715
View directory record Official record
Conditions
Adult Nasal Type Extranodal NK/T-Cell Lymphoma, Adult T-Cell Leukemia/Lymphoma, Anaplastic Large Cell Lymphoma, Angioimmunoblastic T-Cell Lymphoma, B Lymphoblastic Leukemia/Lymphoma, Blastic Plasmacytoid Dendritic Cell Neoplasm, Burkitt Leukemia, Central Nervous System Lymphoma, Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma, Diffuse Large B-Cell Lymphoma, Enteropathy-Associated T-Cell Lymphoma, Extranodal Marginal Zone Lymphoma of Mucosa-Associated Lymphoid Tissue, Grade 1 Follicular Lymphoma, Grade 2 Follicular Lymphoma, Grade 3 Follicular Lymphoma, Hepatosplenic T-Cell Lymphoma, Lymphoplasmacytic Lymphoma, Mantle Cell Lymphoma, Mediastinal (Thymic) Large B-Cell Lymphoma, Mycosis Fungoides, Nasal Type Extranodal NK/T-Cell Lymphoma, Nodal Marginal Zone Lymphoma, Peripheral T-Cell Lymphoma, Not Otherwise Specified, Post-Transplant Lymphoproliferative Disorder, Primary Cutaneous Anaplastic Large Cell Lymphoma, Primary Effusion Lymphoma, Sezary Syndrome, Splenic Marginal Zone Lymphoma, Subcutaneous Panniculitis-Like T-Cell Lymphoma, Systemic Anaplastic Large Cell Lymphoma, T Lymphoblastic Leukemia/Lymphoma, Transformed Recurrent Non-Hodgkin Lymphoma
Interventions
Laboratory Biomarker Analysis, Quality-of-Life Assessment, Questionnaire Administration, Salvia hispanica Seed
Other · Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 14, 2019 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

GI Tract Biomarkers in Infants With Different Diets

NCT03751137
View directory record Official record
Conditions
Obesity, Childhood
Interventions
Not listed
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Weeks to 3 Months
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2025
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 3, 2025 · Synced Sep 4, 2026, 10:58 AM EDT
Completed Not applicable Interventional

Urinary Prostaglandin E Metabolite (PGE-M), A Metabolite of Prostaglandin E2 (PGE2): A Novel Biomarker of Crohn's Disease Activity

NCT00496548
View directory record Official record
Conditions
Crohn's Disease
Interventions
Fecal calprotectin, Urinary PGE-M Level
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2015
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 1, 2017 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational

Effects of Chemotherapy on Intestinal Bacteria in Patients With Newly Diagnosed Breast Cancer

NCT02370277
View directory record Official record
Conditions
Ductal Breast Carcinoma In Situ, Invasive Breast Carcinoma, Stage I Breast Cancer, Stage IIA Breast Cancer, Stage IIB Breast Cancer, Stage IIIA Breast Cancer
Interventions
Cytology Specimen Collection Procedure, Laboratory Biomarker Analysis, Questionnaire Administration
Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older · Female only
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 17, 2019 · Synced Sep 4, 2026, 10:58 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Enteral Glutamine in Reducing Bloodstream Infections in Short Bowel Syndrome Infants

NCT01576003
View directory record Official record
Conditions
Bloodstream Infections, Short Bowel Syndrome, Development, Nutrition, Biological Markers
Interventions
Glutamine, L-alanine
Drug · Dietary Supplement
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Weeks to 12 Months
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
2
States / cities
Ann Arbor, Michigan • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 10, 2020 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational

Fecal Biomarker Study for Patients With Ulcerative Colitis

NCT00780507
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
Not listed
Lead sponsor
Warner Chilcott
Industry
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
61
States / cities
Lowell, Arkansas • Anaheim, California • Folsom, California + 56 more
Source: ClinicalTrials.gov public record
Updated May 30, 2013 · Synced Sep 4, 2026, 10:58 AM EDT
Completed No phase listed Observational Results available

Imaging Biomarkers in Crohn's Associated Spondyloarthritis

NCT02709694
View directory record Official record
Conditions
Crohn's Disease, Spondyloarthritis
Interventions
No intervention
Other
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 24, 2021 · Synced Sep 4, 2026, 10:58 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Biomarker Study of Previously Treated Lyme Disease Volunteers in Comparison to Healthy Volunteers

NCT04835792
View directory record Official record
Conditions
Lyme Disease
Interventions
Stool and blood collection
Other
Lead sponsor
FlightPath Biosciences, Inc.
Industry
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Apr 7, 2021 · Synced Sep 4, 2026, 10:58 AM EDT
Terminated Phase 2 Interventional

Gluten Free Diet in Diminishing Side Effects Patients With Acute Myeloid Leukemia Undergoing Induction Chemotherapy

NCT03108911
View directory record Official record
Conditions
Acute Myeloid Leukemia
Interventions
Best Practice, Biospecimen Collection, Dietary Intervention, Laboratory Biomarker Analysis
Other · Procedure
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 16, 2017 · Synced Sep 4, 2026, 10:58 AM EDT
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 Jul 20, 2026 · Synced Sep 4, 2026, 10:58 AM EDT
Withdrawn Phase 3 Interventional

Calprotectin-Directed Humira® Maintenance Therapy (CADHUM)

NCT01674413
View directory record Official record
Conditions
Crohn's Disease
Interventions
Adalimumab, Adalimumab PRN, Placebo
Drug
Lead sponsor
Peter Higgins
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 23, 2017 · Synced Sep 4, 2026, 10:58 AM EDT