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ClinicalTrials.gov public records Last synced Oct 25, 2026, 4:52 PM EDT

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

Showing 409–432 of 680 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Intestinal Microbiome Clear all
Completed No phase listed Observational

Gut Microbiota And Radiotherapy

NCT02559349
View directory record Official record
Conditions
Lung Tumor
Interventions
Stool Collection
Other
Lead sponsor
Abramson Cancer Center at Penn Medicine
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 6, 2020 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional

Microbiome, Exercise Tracking Study: Among Individuals at High Risk for Colorectal Cancer

NCT02780284
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Physical activity intervention
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
21 Years to 69 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 13, 2022 · Synced Oct 25, 2026, 4:52 PM EDT
Recruiting Phase 2 Interventional

Fecal Microbiome Transplant to Remodel Intestinal Microbiota for Patients With Relapsed or Refractory Lymphoma With Exposure to High-Risk Antibiotics Who Are Receiving Chimeric Antigen Receptor T Cells

NCT07042438
View directory record Official record
Conditions
Recurrent Diffuse Large B-Cell Lymphoma, Recurrent High Grade B-Cell Lymphoma With MYC and BCL2 or BCL6 Rearrangements, Recurrent Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma, Refractory Diffuse Large B-Cell Lymphoma, Refractory High Grade B-Cell Lymphoma With MYC and BCL2 or BCL6 Rearrangements, Refractory Transformed Follicular Lymphoma to Diffuse Large B-Cell Lymphoma
Interventions
Axicabtagene Ciloleucel, Biospecimen Collection, Chemotherapy, Fecal Microbiota Transplantation, Leukapheresis, Placebo Administration
Biological · Procedure · Drug
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Terminated Not applicable Interventional

Influence of Exercise on the Gut Microbiome of Overweight and Obese Adults With Prediabetes

NCT04124354
View directory record Official record
Conditions
PreDiabetes
Interventions
Physical Activity
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
30 Years to 64 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 13, 2021 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Dietary Fiber on Fecal Microbiota and Metabolism

NCT01518088
View directory record Official record
Conditions
Focus of the Study is on Gut Health
Interventions
Dietary Fiber
Dietary Supplement
Lead sponsor
Ingredion Incorporated
Industry
Eligibility
20 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Apr 21, 2016 · Synced Oct 25, 2026, 4:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Influence of Honey-flavored Yogurt on Low-grade Inflammation and Gut Health in Middle to Older Aged Women.

NCT04248127
View directory record Official record
Conditions
Overweight
Interventions
Honey sweetened yogurt, Sugar sweetened yogurt
Other
Lead sponsor
University of California, Davis
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 10, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oral Pomegranate Extract on the Microbiome and Skin Biophysical Properties

NCT04596722
View directory record Official record
Conditions
Human Microbiome
Interventions
Pomella, Placebo
Dietary Supplement · Other
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
25 Years to 55 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Apr 13, 2021 · Synced Oct 25, 2026, 4:52 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome-Mediated Gut Dysfunction in Non-Alcoholic Fatty Liver Disease

NCT05209100
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease
Interventions
Sigmoidoscopy
Procedure
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
35 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Weizmannia (Bacillus) Coagulans JBI-YZ6.3 on Gut Health and Fecal Microbiome Changes

NCT07388264
View directory record Official record
Conditions
Gastrointestinal Symptoms, Constipation, Gut Health, Gastrointestinal Function
Interventions
Weizmannia (Bacillus) coagulans JBI-YZ6.3, Placebo
Dietary Supplement
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effect of Proton Pump Inhibitors on Gut Microbiota and Systemic Inflammation in Older Adults

NCT02844621
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Omeprazole
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
60 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jan 20, 2017 · Synced Oct 25, 2026, 4:52 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 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional

Effects of Yerba Mate Supplementation on Metabolic Health, Physical Function, and Cognition in Older Adults With Excess Adiposity

NCT07883031
View directory record Official record
Conditions
Overweight (BMI > 25), Obesity & Overweight
Interventions
Yerba Mate, Placebo
Dietary Supplement
Lead sponsor
University of North Alabama
Other
Eligibility
60 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Florence, Alabama
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Phase 1Phase 2 Interventional Results available

PRevention Using EPA Against coloREctal Cancer

NCT04216251
View directory record Official record
Conditions
Colorectal Adenoma, Colorectal Cancer, Endoscopic Surgery, Eicosapentaenoic Acid, Gastrointestinal Microbiome
Interventions
AMR101
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 3, 2024 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Novel Nutritional Product on Nutrient Gaps and Gut Health in Active Adults

NCT06521424
View directory record Official record
Conditions
Gastrointestinal Microbiome, Nutrition, Healthy, Exercise
Interventions
AG1 - Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Athletic Greens International
Industry
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Hempstead, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2025 · Synced Oct 25, 2026, 4:52 PM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Evaluation of Milk Polar Lipids in Dyslipidemic Adults With Abdominal Obesity

NCT05700916
View directory record Official record
Conditions
Dyslipidemias, Obesity
Interventions
Milk Polar Lipid-Rich Dairy Powder, Dairy Powder
Drug · Dietary Supplement
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 70 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional

Maternal Probiotic Supplementation for Improved Outcomes in Infants of Diabetic Mothers

NCT05467150
View directory record Official record
Conditions
Infant of Diabetic Mother
Interventions
Probiotic Supplement
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Phase 1 Interventional Results available

Intestinal Permeability in Preterm Infants

NCT01756040
View directory record Official record
Conditions
Prematurity, Intestinal Permeability
Interventions
Lactulose -rhamnose solution
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
Up to 4 Days
Enrollment
211 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 18, 2023 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Efficacy of a Postbiotic Supplement on Menopausal Symptoms in Premenopausal Women

NCT07570043
View directory record Official record
Conditions
Perimenopause, Menopausal Symptoms, Menopause-Related Quality of Life, Microbiome
Interventions
Supplement, Placebo
Dietary Supplement · Other
Lead sponsor
Able Biolabs, LLC
Other
Eligibility
35 Years to 55 Years · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Walnuts and Colon Health (The WellNut Trial)

NCT05195970
View directory record Official record
Conditions
Colorectal Cancer, Diet Habit
Interventions
Walnuts
Other
Lead sponsor
UConn Health
Other
Eligibility
39 Years to 75 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
2
States / cities
Farmington, Connecticut • New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Recruiting Not applicable Interventional

Effect of Watermelon on Gut and Cardiometabolic Health

NCT06588218
View directory record Official record
Conditions
Obesity and Overweight, Dysbiosis
Interventions
Watermelon, Belvita Breakfast Sandwich + 12 oz Water
Other
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 30 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Apr 9, 2026 · Synced Oct 25, 2026, 4:52 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Spices for Cultivating a Healthy Gut Microbiome and Cardiometabolic Profile

NCT06313580
View directory record Official record
Conditions
Cardiometabolic Syndrome
Interventions
Yogurt with added Spices, Yogurt without added Spices
Other
Lead sponsor
University of Alabama, Tuscaloosa
Other
Eligibility
50 Years to 69 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Tuscaloosa, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 20, 2024 · Synced Oct 25, 2026, 4:52 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Enfamil NeuroPro Study

NCT06059209
View directory record Official record
Conditions
Infant Development, Infant ALL
Interventions
Enfamil NeuroPro, Enfamil Infant
Dietary Supplement
Lead sponsor
University of Arizona
Other
Eligibility
0 Months to 4 Months
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Oct 25, 2026, 4:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Precision Nutrition New York Study

NCT06777498
View directory record Official record
Conditions
Body Composition Changes, Body Weight Changes
Interventions
Whole Grain Intervention then fruits and vegetables, Fruit and Vegetable Intervention and then whole grains
Other
Lead sponsor
Cornell University
Other
Eligibility
21 Years to 50 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Jul 11, 2025 · Synced Oct 25, 2026, 4:52 PM EDT