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Showing 1–24 of 439 matching trials from the live ClinicalTrials.gov search.
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Completed Not applicable Interventional Accepts healthy volunteers

Cold Water Exposure and Immune Function Study

NCT06667479
View directory record Official record
Conditions
Cold Water Immersion, Immune Function, Muscular Strength, Mental Health
Interventions
Cold Water Immersion (CWI) - Cold Tub Immersion (CI), Cold Water Immersion (CWI) - Cold Shower (CS), Control Group (CO)
Other
Lead sponsor
University of Northern Colorado
Other
Eligibility
18 Years to 45 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Greeley, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

The Effects of a Novel Probiotic Supplement on Menopausal Symptoms and Bone Health

NCT04001088
View directory record Official record
Conditions
Menopause
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Lallemand Health Solutions
Industry
Eligibility
40 Years to 59 Years · Female only
Enrollment
144 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
5
States / cities
Lake Worth, Florida • Port Saint Lucie, Florida • Atlanta, Georgia + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Phase 3 Interventional

ColoRectal Cancer Screening for Southern California Community Health Centers

NCT04941300
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Mailed FIT Outreach, Standardized navigation
Other
Lead sponsor
University of California, San Diego
Other
Eligibility
50 Years to 75 Years
Enrollment
55,999 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 1, 2026, 10:11 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 4, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Recruiting Phase 1Phase 2 Interventional

Probiotics and Gut Health

NCT03418857
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Yogurt smoothie with BB-12, Yogurt smoothie
Drug
Lead sponsor
Penn State University
Other
Eligibility
55 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 13, 2021 · Synced Sep 1, 2026, 10:11 PM EDT
Recruiting Not applicable Interventional

A Randomized, Triple-blind, Placebo-controlled Study to Evaluate the Effects of a Supplement on Nutrient Gaps and Gut Health Among Individuals Utilizing GLP-1 RAs

NCT07437911
View directory record Official record
Conditions
Nutrition Intake, Nutrition Status, Gastrointestinal Microbiome, GLP-1
Interventions
AG1 - Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Athletic Greens International
Industry
Eligibility
18 Years to 59 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blueberry Intake and Infant Gut Health

NCT05006989
View directory record Official record
Conditions
Infant Development
Interventions
Blueberry Powder, Placebo Powder
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
4 Months to 5 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 29, 2025 · Synced Sep 1, 2026, 10:11 PM EDT
Recruiting Not applicable Interventional

Feasibility and Potential Efficacy of Herbs and Spices for Improving Dietary Quality in College Students: A Pilot Study

NCT07082348
View directory record Official record
Conditions
Dietary Quality, Feasibility Studies, College Student, Dietary Guidelines for Americans, Gut Microbiome, Lipid Profiles, Herbs and Spices, Acceptability, Inflammation Biomarkers, Body Composition, Anthropometrics
Interventions
Herbs and Spices Nutrition Education Program
Behavioral
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
18 Years to 39 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Nov 23, 2025 · Synced Sep 1, 2026, 10:11 PM EDT
Completed No phase listed Observational Results available

Patient Attitudes and Preferences for Outcomes of Inflammatory Bowel Disease Therapeutics

NCT02316678
View directory record Official record
Conditions
Colitis, Ulcerative, Inflammatory Bowel Diseases, Crohn's Disease
Interventions
No intervention
Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
9,573 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 18, 2017 · Synced Sep 1, 2026, 10:11 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 1, 2026, 10:11 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 1, 2026, 10:11 PM EDT
Not yet recruiting Not applicable Interventional

Comparing Prebiotic Fiber Supplements for Gut Health and Digestive Comfort

NCT07525180
View directory record Official record
Conditions
Healthy Participants
Interventions
LOAM, Inulin, Cellulose Placebo
Dietary Supplement
Lead sponsor
Ventoscity LLC
Industry
Eligibility
18 Years to 65 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed No phase listed Observational Results available

The Sexual Health of Rectal Cancer Patients

NCT00712751
View directory record Official record
Conditions
Rectal Cancer, Rectum
Interventions
questionnaires, CSI-SH- Cancer Survivorship Intervention
Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
21 Years and older
Enrollment
149 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2024
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Fermented Vegetables on Gut Microflora and Inflammation in Women

NCT03407794
View directory record Official record
Conditions
Inflammation, Women's Health, Gastrointestinal Microbiome
Interventions
Fermented vegetable, Non-fermented vegetable
Other
Lead sponsor
University of North Florida
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 10, 2023 · Synced Sep 1, 2026, 10:11 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Smoothie Program for Achieving and Resilient Kids

NCT07195474
View directory record Official record
Conditions
Executive Functions (EF), Microbiome, Dietary Quality
Interventions
Yogurt Smoothie (1 per day), Yogurt Smoothie (2 per day), Fruit Juice Control
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
7 Years to 9 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
State College, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 19, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Exploratory Investigation of a Supplement to Promote Gut Health

NCT05831527
View directory record Official record
Conditions
Gastrointestinal Symptoms, Exercise Performance
Interventions
ARMRA™ Bovine Colostrum
Drug
Lead sponsor
Armra
Industry
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Apr 25, 2023 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Safety, Tolerability, and Biosignature of Humanized Prebiotics in Healthy Adults

NCT06068894
View directory record Official record
Conditions
Intestinal Health
Interventions
"Humanized" galacto-oligosaccharides (hGOS), Galacto-oligosaccharides (GOS), Matching Placebo
Dietary Supplement · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Scalable Nutrition Adherence Intervention

NCT06121986
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment, Adherence
Interventions
Improving Cognitive Aging through Nutrition (ICAN) Adherence Program, Improving Cognitive Aging through Nutrition, Mediterranean diet
Behavioral
Lead sponsor
Florida State University
Other
Eligibility
55 Years to 85 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Results available

Cardiometabolic Benefits of Potatoes Mediated Along the Gut-Vessel Axis in Adults With Metabolic Syndrome

NCT03624569
View directory record Official record
Conditions
Cardiovascular Diseases, Endotoxemia, Endothelial Dysfunction, Postprandial Hyperglycemia, Gut Health
Interventions
Bagel, Potato
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 50 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Sep 1, 2026, 10:11 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Hummus for Health: Dietary Quality and Health Outcomes in Toddlers

NCT02696278
View directory record Official record
Conditions
Obesity
Interventions
Lesson about vegetables, Vegetables, Hummus
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
12 Months to 24 Months
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2017 · Synced Sep 1, 2026, 10:11 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Integrating Targeted MedlinePlus Health Prescriptions Into Clinic Practice Workflow

NCT00634608
View directory record Official record
Conditions
Allergic Rhinitis, Asthma, Back Pain, Benign Prostatic Hypertrophy, Bursitis, Depression, Anxiety, Diabetes Mellitus, Esophageal Reflux, HIV Infections, Hyperlipidemia, Hypertension, Insomnia, Irritable Bowel Syndrome, Obesity, Osteoporosis (Senile), Shoulder Pain, Sinusitis, Symptomatic Menopause, Urinary Incontinence, Urinary Tract Infection, Vaginitis
Interventions
Health Information Prescription
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
224 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 29, 2016 · Synced Sep 1, 2026, 10:11 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 1, 2026, 10:11 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Modifying Diet to Improve Gut Microbiome

NCT03924778
View directory record Official record
Conditions
Obesity
Interventions
DASH diet, standard American diet
Behavioral
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Sep 1, 2026, 10:11 PM 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 1, 2026, 10:11 PM EDT