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Showing 1–24 of 442 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Gut Health Clear all
Recruiting Not applicable Interventional

Wild Blueberries for Gut, Brain, and Heart Health in Adults With High Blood Pressure

NCT06735599
View directory record Official record
Conditions
Hypertension (Without Type 2 Diabetes Mellitus), High Blood Pressure, Male, Female, Adult, Cognition, Endothelial Function (Reactive Hyperemia), Oxidative Stress, Diet, Overweight, Body Composition Measurement, Gut Microbiome, Arterial Stiffness, Caucasian Whites, Inflammation, Microvascular Function
Interventions
Wild Blueberry, Placebo
Dietary Supplement
Lead sponsor
Georgia State University
Other
Eligibility
45 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 1, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PREDICT 2: Personalized Responses to Dietary Composition Trial 2

NCT03983733
View directory record Official record
Conditions
Diabetes, Heart Diseases, Diet Habit, Diet Modification, Microbial Colonization, Healthy, Obesity, Metabolism
Interventions
Dietary Intervention
Other
Lead sponsor
Zoe Global Limited
Other
Eligibility
18 Years to 70 Years
Enrollment
1,139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 17, 2022 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional

MD2Me - Texting to Promote Chronic Disease Management

NCT01253733
View directory record Official record
Conditions
Cystic Fibrosis, Inflammatory Bowel Disease, Type 1 Diabetes, Chronic Disease Management
Interventions
MD2ME
Behavioral
Lead sponsor
Huang, Jeannie, M.D.
Individual
Eligibility
14 Years to 22 Years
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jan 25, 2016 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional

Systems of Support (SOS) to Increase Colon Cancer Screening and Follow-up

NCT00697047
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Automated Mailing, Automated Mailing Plus Assisted, Auto Plus Assisted Plus Navigation
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
50 Years to 73 Years
Enrollment
4,653 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2019
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Commercially Available Synbiotic on the Gut Microbiome and Cardiometabolic Health

NCT07515443
View directory record Official record
Conditions
Hypertension, Gut Dysbiosis, Overweight , Obesity
Interventions
Synbiotic, Placebo
Dietary Supplement
Lead sponsor
Southern Utah University
Other
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Cedar, Utah
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Social Network Interventions in Rural Honduras

NCT01672580
View directory record Official record
Conditions
Malnutrition, Dysentery, Social Transmission of Health Behaviors
Interventions
exposure to vitamin use, exposure to water chlorination, high in-degree, nominated by random
Behavioral
Lead sponsor
Harvard University
Other
Eligibility
15 Years and older
Enrollment
5,773 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 18, 2015 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional

Well-being in IBS: Strengths and Happiness (WISH)

NCT05289089
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Positive Psychology Intervention
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 21, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Active, not recruiting No phase listed Observational

Changes in Pelvic Health, Sexual Function, and Quality of Life in Women With Pelvic Cancer Undergoing Radiation Therapy

NCT04713618
View directory record Official record
Conditions
Anal Carcinoma, Cervical Carcinoma, Endometrial Carcinoma, Malignant Pelvic Neoplasm, Rectal Carcinoma, Vaginal Carcinoma, Vulvar Carcinoma
Interventions
Pelvic Examination, Survey
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Health Service Intervention for the Improvement of Access and Adherence to Colorectal Cancer Screening

NCT04607291
View directory record Official record
Conditions
Colorectal Carcinoma
Interventions
Community Health Service, Survey Administration
Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
50 Years to 75 Years
Enrollment
183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 11, 2021 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Novel Nutritional Product on Nutrient Gaps and Gut Health in Adults With Occasional Gastrointestinal Issues

NCT06564285
View directory record Official record
Conditions
Gastrointestinal Microbiome, Nutrition, Healthy
Interventions
AG1 - Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Athletic Greens International
Industry
Eligibility
18 Years to 60 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 3, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Integration of Cancer Health Activities Into African American Churches

NCT03178383
View directory record Official record
Conditions
Breast Cancer, Prostate Cancer, Colorectal Cancer
Interventions
Project HEAL, Project HEAL 2.0
Behavioral
Lead sponsor
University of Maryland, College Park
Other
Eligibility
18 Years and older
Enrollment
446 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
College Park, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 31, 2022 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

FlaxFx, A Research Study of the Effects of Flaxseed Lignans on Colon Health

NCT01619020
View directory record Official record
Conditions
Healthy
Interventions
Flaxseed Lignans
Dietary Supplement
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
20 Years to 45 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 12, 2017 · Synced Sep 5, 2026, 3:13 PM EDT
Not yet recruiting Not applicable Interventional

Medically Tailored Meals to Reduce Ultra-processed Food Intake in Colorectal Cancer Survivors

NCT07701707
View directory record Official record
Conditions
Colorectal Cancer (Diagnosis)
Interventions
MTM: Medically tailored meals, MTM plus Fresh Produce, Control group
Behavioral
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Tributyrin: Time Course & Efficacy to Improve Health & Performance

NCT06501898
View directory record Official record
Conditions
Metabolite Concentration, Gut Permeability, Inflammation, Sleep, Performance
Interventions
CoreBiome, Placebo
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
30 Years to 50 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Apr 12, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Skeletal Health and Bone Marrow Composition in Newly Diagnosed Adolescents With Crohn Disease

NCT04508088
View directory record Official record
Conditions
Inflammatory Bowel Disease, Crohn Disease
Interventions
Coronal T1 weighted spin echo images, Spin-lattice relaxation (T1), Magnetic resonance spectroscopy, Blood Draw
Diagnostic Test
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
13 Years to 20 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 29, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

LpD3.5 Intervention Study in Older Adults- LISA-I Trial

NCT07794956
View directory record Official record
Conditions
Mild Cognitive Impairment (MCI), Cognition, Brain Aging, Microbiome Dysbiosis, Leaky Gut Syndrome, Gut Inflammation, Inflammaging
Interventions
LpD3.5, Placebo
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
60 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Community Health Workers United to Reduce Colorectal Cancer and Cardiovascular Disease Among People at Higher Risk

NCT05174286
View directory record Official record
Conditions
Colorectal Cancer
Interventions
SBIRT, Referral as Usual (RAU)
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
45 Years and older
Enrollment
880 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Sep 5, 2026, 3:13 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 26, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Aronia Berries on Vascular Endothelial Function and the Gut Microbiota in Middle-Aged/Older Adults

NCT03824041
View directory record Official record
Conditions
Endothelial Dysfunction, Aging
Interventions
Aronia full spectrum - half dose, Aronia full spectrum - full dose, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
45 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 2, 2023 · Synced Sep 5, 2026, 3:13 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Implementing a Multilevel Intervention to Accelerate Colorectal Cancer Screening and Follow-up

NCT04514341
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Intervention Phase 1: Provider and Staff education, Intervention Phase 2: Provider and staff education + Patient reminder, Intervention Phase 3: Provider and Staff education + Patient reminder + Patient navigation
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
50 Years to 75 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Oak Park, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Almonds to Improve Gut Health and Decrease Inflammation

NCT05790564
View directory record Official record
Conditions
Metabolic Syndrome, Dysbiosis, Inflammation
Interventions
Almond, Crackers
Other
Lead sponsor
Oregon State University
Other
Eligibility
35 Years to 60 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Pulse Consumption on Bone Health of Postmenopausal Women

NCT04692298
View directory record Official record
Conditions
Menopause
Interventions
pulses
Other
Lead sponsor
Oklahoma State University
Other
Eligibility
45 Years to 65 Years · Female only
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Sep 5, 2026, 3:13 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

How a Single Workout Affects Gut Bugs in Women With Different Fitness Levels and Body Types

NCT06691100
View directory record Official record
Conditions
Weight Management, Obesity, Exercise, Women, Gut Microbiome, Metabolome, Health, Gut Microbiota
Interventions
Aerobic Exercise
Behavioral
Lead sponsor
George Washington University
Other
Eligibility
21 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 5, 2026, 3:13 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Efficacy and Patient Satisfaction of Miralax and Gatorade Versus Movi Prep

NCT01695863
View directory record Official record
Conditions
Colorectal Cancer
Interventions
comparing 2 drugs on their effect on the bowel preparation for colonoscopy
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 1, 2023 · Synced Sep 5, 2026, 3:13 PM EDT