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ClinicalTrials.gov public records Last synced Oct 26, 2026, 10:51 PM EDT

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Showing 577–600 of 680 matching trials from the live ClinicalTrials.gov search.
Recruiting No phase listed Observational Accepts healthy volunteers

Microbiome Dysfunction in Surgical Intensive Care Unit Survivors

NCT05357170
Conditions
Sepsis, Trauma Injury
Interventions
Human feces collection
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 110 Years
Enrollment
468 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Gainesville, Florida
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Smoothie Program for Achieving and Resilient Kids

NCT07195474
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
Not listed No phase listed Observational

Impact of Tecfidera on Gut Microbiota

NCT02736279
Conditions
Multiple Sclerosis
Interventions
Dimethyl fumarate
Drug
Lead sponsor
Virginia Simnad
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Kirkland, Washington
Conditions
MASLD, Fatty Liver
Interventions
Peanut consumption
Other
Lead sponsor
Henry Ford Health System
Other
Eligibility
30 Years to 70 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Detroit, Michigan
Recruiting No phase listed Observational

Gut Microbiota in Metabolic Surgery

NCT05000996
Conditions
Bariatric Surgery Candidate, Cardiovascular Diseases, Type 2 Diabetes, Dyslipidemias, Hypertension, Morbid Obesity
Interventions
Bariatric Surgery
Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
21 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2035
U.S. locations
1
States / cities
Nashville, Tennessee
Recruiting Not applicable Interventional Accepts healthy volunteers

Gut Mini-Pill Study

NCT07220369
Conditions
Gut Microbiota
Interventions
plant-based meat alternative entrees, mini-pill, meat based entree
Other · Device
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Conditions
Gut Microbiome, Gut Health, Dietary Supplement, L-Phenylalanine, Phenylpropionic Acid
Interventions
L-Phenylalanine 500 mg Veg Capsule product
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
New York, New York
Conditions
Carcinoma, Non-Small-Cell Lung, Carcinoma, Colorectal
Interventions
Pembrolizumab Injection
Drug
Lead sponsor
Persephone Biosciences
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2028
U.S. locations
2
States / cities
Fountain Valley, California • Winter Haven, Florida
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
Conditions
Prostate Cancer (Adenocarcinoma), Metastatic Prostate Cancer
Interventions
Abiraterone acetate, Dexamethasone, Metronidazole
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older · Male only
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2032
U.S. locations
1
States / cities
Baltimore, Maryland
Conditions
Obesity &Amp; Overweight
Interventions
Cardiovascular Exercise, Butyrate
Behavioral · Dietary Supplement
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Fort Worth, Texas
Conditions
Inflammatory Bowel Diseases (IBD), Ankylosing Spondylitis (AS)
Interventions
Pinch biopsies, Flexible sigmoidoscopy
Procedure
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 70 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2026
U.S. locations
1
States / cities
Denver, Colorado
Conditions
Bipolar Disorder, Bipolar I Disorder, Bipolar II Disorder, Bipolar Type I Disorder, Bipolar Disorder Mild, Bipolar Disorder Moderate, Bipolar Disorder Severe
Interventions
No intervention
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
Ventura, California
Conditions
Type2diabetes, Heart Failure With Preserved Ejection Fraction
Interventions
Potato Starch
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
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
Conditions
Crohn Disease
Interventions
Diet 1, Diet 2
Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Seattle, Washington
Completed Phase 1Phase 2 Interventional

FMT in Pediatric Crohn's Disease

NCT03194529
Conditions
Crohn Disease, Pediatric Crohns Disease
Interventions
FMT
Biological
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
7 Years to 21 Years
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Los Angeles, California
Completed Not applicable Interventional Accepts healthy volunteers

Tart Cherry Supplementation & Gut Microbiome and Inflammation

NCT04467372
Conditions
Inflammation, Glucose Regulation, Sleep
Interventions
Tart cherry juice concentrate, Juice placebo, Freeze dried tart cherry powder, Capsule placebo
Dietary Supplement
Lead sponsor
Ohio University
Other
Eligibility
18 Years to 55 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Athens, Ohio
Completed No phase listed Observational

Mucosal Versus Fecal Microbiota in FMT

NCT02133651
Conditions
Clostridium Difficile
Interventions
Not listed
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Atlanta, Georgia
Completed Not applicable Interventional Accepts healthy volunteers

Fermented Vegetables and Gut Microbiome Pilot Study

NCT06883994
Conditions
Fermented Vegetable Intake, Fermented Vegetable Acceptability, Gut Health, Gut Microbiome, Gastrointestinal Immune Function, Microbiome
Interventions
Fermented vegetable intervention
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Davis, California
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Probiotics on the Shift in Gut Microbiome and Skin Carotenoid Levels

NCT04841694
Conditions
Human Microbiome
Interventions
Probiotic
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
40 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Sacramento, California
Conditions
Linear Growth, Neurodevelopment, Gut Microbiome
Interventions
Baby Foods, Foods from the home
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
5 Months to 6 Months
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Aurora, Colorado
Recruiting Not applicable Interventional Accepts healthy volunteers

Evaluating Response to Vitamin D3 and K2 Supplementation in Healthcare Personnel

NCT07199829
Conditions
Hypovitaminosis D, Hypovitaminosis
Interventions
Vitamin Arm 1, Vitamin Arm 2, Vitamin Arm 3, Placebo
Dietary Supplement · Other
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 69 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Tacoma, Washington
Conditions
Obesity, Overweight, Overweight and Obesity, PreDiabetes, Type 2 Diabetes, Type 2 Diabetes Mellitus, Type 2 Diabetes Mellitus in Obese
Interventions
Physical Activity Intervention
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
30 Years to 64 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Minneapolis, Minnesota