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ClinicalTrials.gov public records Last synced Oct 23, 2026, 7:32 PM EDT

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Showing 97–120 of 680 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Intestinal Microbiome Clear all
Active, not recruiting Not applicable Interventional

Microbiome and Rectal Cancer

NCT04223102
View directory record Official record
Conditions
Rectal Cancer, Locally Advanced Malignant Neoplasm
Interventions
Tissue collection
Procedure
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
3
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Aug 2, 2023 · Synced Oct 23, 2026, 7:32 PM EDT
Completed No phase listed Observational

Gut Microbiota in Intestinal Barrier Damage in Acute Leukemia Patients Undergoing Inpatient Induction

NCT03316456
View directory record Official record
Conditions
Chemotherapy-Induced Gut Barrier Damage, Acute Leukemia
Interventions
Observational: Stool Sample Collection, Observational: Blood Sample Collection, Observational: Urine Sample Collection
Diagnostic Test
Lead sponsor
Masonic Cancer Center, University of Minnesota
Other
Eligibility
18 Years to 99 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 6, 2019 · Synced Oct 23, 2026, 7:32 PM EDT
Completed Not applicable Interventional

Ginger and Gut Microbiome (GINGER)

NCT03268655
View directory record Official record
Conditions
Colorectal Adenoma
Interventions
Ginger extract, Placebo
Dietary Supplement · Other
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 75 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
13
States / cities
Albert Lea, Minnesota • Austin, Minnesota • Deer River, Minnesota + 10 more
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Oct 23, 2026, 7:32 PM EDT
Terminated No phase listed Observational

Characterization Of the Intestinal Microbiome Evolution After Kidney Transplant Donation or Receipt

NCT03043339
View directory record Official record
Conditions
Renal Transplant
Interventions
Stool Specimen Collection, Anal Swab Sampling, Short Diet Assessment (SDA), NHANES Dietary Screener Questionnaire (DSQ)
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 26, 2024 · Synced Oct 23, 2026, 7:32 PM EDT
Not yet recruiting Phase 1Phase 2 Interventional

Butyric Acid Supplementation for Gut Improvement After Cardiac Surgery in Kids

NCT06882772
View directory record Official record
Conditions
Congenital Heart Disease (CHD)
Interventions
2 mL SunButyrate-TG, Placebo, 4 mL SunButyrate-TG
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
1 Month to 3 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Role of the Gut Microbiome on Lean Mass and Physical Function in Older Adults

NCT02811445
View directory record Official record
Conditions
Sarcopenia
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
70 Years to 85 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 6, 2020 · Synced Oct 23, 2026, 7:32 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Phenolic Dependent And Independent Effects Of Whole Grain Sorghum On Immunometabolism

NCT07832071
View directory record Official record
Conditions
Dietary Intervention, Gut Microbiota, Insulin Sensitivity/Resistance, Obesity & Overweight
Interventions
Whole grain sumac sorghum, Whole grain white sorghum, White rice
Other
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
19 Years to 64 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Recruiting Phase 1 Interventional

Intestinal Microbiota Transplantation in Patients Undergoing Colon Resection

NCT06370884
View directory record Official record
Conditions
Recurrent Clostridioides Difficile Infection, Colonic Surgery
Interventions
IMT
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of a Yoga Intervention on Pain and Multiomics in Participants With IBS

NCT04315714
View directory record Official record
Conditions
Irritable Bowel Syndrome, Abdominal Pain
Interventions
Yoga Program
Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 55 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 2, 2021 · Synced Oct 23, 2026, 7:32 PM EDT
Completed Phase 1 Interventional

Chlorhexidine Gel Therapy for Cariogenic Oral Microflora

NCT01036412
View directory record Official record
Conditions
Head and Neck Cancer
Interventions
1% Chlorhexidine Gluconate Gel, Surveys
Drug · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 19, 2016 · Synced Oct 23, 2026, 7:32 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Impact of Dietary Intervention on Inflammation and Microbiome Composition Post-Colonoscopy

NCT06603519
View directory record Official record
Conditions
Colorectal Polyp, Inflammation, Dietary Intervention, Microbiota, Colorectal Neoplasms, Metabolomics
Interventions
Modified Plant-Based Mediterranean Diet
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Native Chicory Inulin on Change and Persistence of Gut Microbiota

NCT06528041
View directory record Official record
Conditions
Healthy
Interventions
Inulin, Maltodextrin
Other
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 45 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Oct 23, 2026, 7:32 PM EDT
Recruiting No phase listed Observational

The Role of Brain-Bone Marrow-Gut Interaction Following Major Trauma

NCT06606119
View directory record Official record
Conditions
Trauma Injury, Trauma, Critical Illness, Microbiome, Chronic Anemia, Acute Blood Loss Anemia
Interventions
Data and tissue collection
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 100 Years
Enrollment
275 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
3
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 6, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Completed No phase listed Observational

The Association Between Gut Microbiota Diversity and Postpartum Depression

NCT07227753
View directory record Official record
Conditions
Depression During Pregnancy
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 23, 2026, 7:32 PM 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 18, 2019 · Synced Oct 23, 2026, 7:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Red Raspberry Polyphenols on Gut Microbiome

NCT03049631
View directory record Official record
Conditions
Healthy Subjects, Pre-diabetes
Interventions
Raspberry and fructooligosaccharide, Raspberry
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
20 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 14, 2020 · Synced Oct 23, 2026, 7:32 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 23, 2026, 7:32 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Gut Kidney Axis in Enteric Hyperoxaluria

NCT05124886
View directory record Official record
Conditions
Enteric Hyperoxaluria
Interventions
Moderately High Oxalate (MOx) Diet
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Defining the Role of the Gut Microbiome in Mediating the Effects of Obesity on Intestinal Stem Cells

NCT02863029
View directory record Official record
Conditions
Obesity
Interventions
Flexible Sigmoidoscopy
Procedure
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 18, 2022 · Synced Oct 23, 2026, 7:32 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Effect Cranberry-Based Products on the Female Microbiome

NCT07109713
View directory record Official record
Conditions
Vaginal Microbiome, Gut Microbiome, Gut Health
Interventions
Active, Placebo
Dietary Supplement
Lead sponsor
Ocean Spray Cranberries, Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 14, 2025 · Synced Oct 23, 2026, 7:32 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers Results available

Xanthohumol Metabolism and Signature

NCT03735420
View directory record Official record
Conditions
Healthy
Interventions
Xanthohumol, Placebo oral capsule
Drug
Lead sponsor
National University of Natural Medicine
Other
Eligibility
21 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 27, 2024 · Synced Oct 23, 2026, 7:32 PM EDT
Not yet recruiting Phase 2 Interventional

A Clinical Trial of Resistant Potato Starch for Gut MDRO Decolonization

NCT07792915
View directory record Official record
Conditions
Clostridium Infections, Methicillin-resistant Staphylococcus Aureus (MRSA), Vancomycin-Resistant Enterococci, Carbapenem-Resistant Enterobacteriaceae, Asymptomatic Infections
Interventions
Resistant Potato Starch, Maltodextrin
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2030
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 28, 2026 · Synced Oct 23, 2026, 7:32 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Early Avocado Exposure on Development and the Gut Microbiome in American Hispanic Infants

NCT06876935
View directory record Official record
Conditions
Gut Microbiome, Neurocognitive Correlates of Eating Habits, Infant Growth
Interventions
Daily avocado
Other
Lead sponsor
Arizona State University
Other
Eligibility
3 Months to 6 Months
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 27, 2025 · Synced Oct 23, 2026, 7:32 PM EDT