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ClinicalTrials.gov public records Last synced Oct 4, 2026, 9:36 AM EDT

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Showing 49–72 of 89 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Healthy Gut Microbiota Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Investigation of the Gut Microbiome and Statin Response

NCT04098003
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Rosuvastatin, Placebo
Drug
Lead sponsor
Sony Tuteja
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Phildelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Military Health and Nutrition Examination Study

NCT06380322
View directory record Official record
Conditions
Hypertension, Type 2 Diabetes, Dyslipidemias, Cardiovascular Diseases
Interventions
Not listed
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years and older
Enrollment
648 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
6
States / cities
Fort Carson, Colorado • Hinesville, Georgia • Fort Campbell, Kentucky + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 17, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Short-Term Effects of Multi-Fiber Supplementation on Gut Health

NCT07787026
View directory record Official record
Conditions
Mixed Fiber Supplementation for Healthy Adults
Interventions
Prebiotic, Placebo
Dietary Supplement
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Studies of Skin Microbes in Healthy People and in People With Skin Conditions

NCT00605878
View directory record Official record
Conditions
Eczema, Atopic Dermatitis
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
2 Years to 100 Years
Enrollment
530 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 16, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Roles of Gut Microbiome in UTI Susceptible Women

NCT05065008
View directory record Official record
Conditions
Healthy
Interventions
Cranberry juice, Apple juice
Other
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 65 Years · Female only
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

What's Hopping? Cricket Protein and Human Gut Microbiota

NCT03383341
View directory record Official record
Conditions
Healthy
Interventions
Cricket Protein Powder, Placebo control
Dietary Supplement · Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 4, 2019 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Aspirin on Gut Microbiome

NCT02761486
View directory record Official record
Conditions
Healthy
Interventions
Aspirin, Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 26, 2020 · Synced Oct 4, 2026, 9:36 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Understanding the Efficacy of Dietary Supplement on Fungal Mycobiota in Healthy Volunteers: A Pilot Study

NCT06433310
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jun 26, 2026 · Synced Oct 4, 2026, 9:36 AM 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 13, 2017 · Synced Oct 4, 2026, 9:36 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Gastrointestinal Tract Microbiome in Healthy Term Infants Receiving Mother'S-own Breast Milk or Cow's Milk-based Infant Formulas

NCT04059666
View directory record Official record
Conditions
Gastrointestinal Microbiome
Interventions
Investigational, Control
Other
Lead sponsor
Mead Johnson Nutrition
Industry
Eligibility
7 Days to 18 Days
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
5
States / cities
Birmingham, Alabama • Altamonte Springs, Florida • Owensboro, Kentucky + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2022 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Evaluation of Changes to Skin Microbiome With Tape-Stripped Wounds

NCT03365934
View directory record Official record
Conditions
Healthy Volunteers
Interventions
ADHESIVE BANDAGE #1, ADHESIVE BANDAGE #2, ADHESIVE BANDAGE #3, Antibacterial Bandage with 0.8% BZK, Intact and No Bandage, Wounded and No Bandage
Device · Other
Lead sponsor
Johnson & Johnson Consumer Inc. (J&JCI)
Industry
Eligibility
18 Years to 55 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Fair Lawn, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 4, 2019 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Adult HMO Supplementation and the Gut Microbiome

NCT06570330
View directory record Official record
Conditions
Healthy Adults
Interventions
SuperHMO, Non-GMO corn Maltodextrin, Rapid Absorption
Dietary Supplement
Lead sponsor
Seeding Inc
Industry
Eligibility
18 Years to 40 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 24, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Resistant Maltodextrin Supplementation: Gastrointestinal Health

NCT02733263
View directory record Official record
Conditions
Healthy
Interventions
15 g RMD, 25 g RMD, 0 g RMD
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 50 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 2, 2018 · Synced Oct 4, 2026, 9:36 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Response of Gut Microbiota and Cardiometabolic Biomarkers to Consumption of Walnuts

NCT04307628
View directory record Official record
Conditions
Healthy, Normal Weight, Overweight, Obese
Interventions
Walnut, Nut-Free
Other
Lead sponsor
University of California, Davis
Other
Eligibility
20 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced Oct 4, 2026, 9:36 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Novel Fecal Sample Collection Method for Metagenomic Analyses

NCT05172414
View directory record Official record
Conditions
Healthy
Interventions
No intervention
Other
Lead sponsor
Onegevity Health
Industry
Eligibility
18 Years to 79 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 1, 2023 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Crofelemer on the Gut Microbiome in Healthy Volunteers and in HIV+ Patients With Non-Infectious Diarrhea

NCT04192487
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, Healthy Volunteers, HIV/AIDS, HIV Diarrhea, Human Immunodeficiency Virus
Interventions
Crofelemer delayed-release tablets 125mg
Drug
Lead sponsor
Napo Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
3
States / cities
Tustin, California • Stratford, Connecticut • Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 22, 2021 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Resistant Starch Blend Gastrointestinal Impact

NCT03983772
View directory record Official record
Conditions
Quality of Life, Health, Subjective
Interventions
RS blend, Placebo
Dietary Supplement · Other
Lead sponsor
Metagenics, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Gig Harbor, Washington
Source: ClinicalTrials.gov public record
Updated Apr 6, 2022 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Pill

NCT07243756
View directory record Official record
Conditions
Healthy
Interventions
3D-printed ingestible pill
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Oct 4, 2026, 9:36 AM 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 4, 2026, 9:36 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Infant Microbiota and Probiotic Intake Study

NCT02457338
View directory record Official record
Conditions
Healthy
Interventions
Bifidobacterium
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2027
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 5, 2025 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Diets on the Gut Microbiota Composition and Cardiometabolic Wellbeing

NCT03539666
View directory record Official record
Conditions
Healthy
Interventions
diet
Other
Lead sponsor
South Dakota State University
Other
Eligibility
50 Years and older
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Brookings, South Dakota
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Xla1 Christensenella Minuta, Phase I, Randomized, Partially Placebo-controlled Double-blind Protocol, Evaluating Safety, Tolerability and Impact on the Gut Microbiota in Healthy Volunteers, Overweight and Obese Adults

NCT04663139
View directory record Official record
Conditions
Obesity, Metabolic Disease
Interventions
Xla1, Placebo
Drug
Lead sponsor
YSOPIA Bioscience
Industry
Eligibility
19 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 13, 2021 · Synced Oct 4, 2026, 9:36 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

First Complementary Foods and the Infant Gastrointestinal Microbiota

NCT05492253
View directory record Official record
Conditions
Healthy Participants, Infants, Gastrointestinal Microbiota
Interventions
Infant fruit, Infant vegetable, Infant meat, Infant grain
Other
Lead sponsor
University of Delaware
Other
Eligibility
5 Months to 7 Months
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated May 17, 2024 · Synced Oct 4, 2026, 9:36 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

HomeStyles-Adults of Chinese Heritage

NCT06136793
View directory record Official record
Conditions
Healthy Lifestyle, Home Environment Related Disease, Cardiometabolic Disease, Systemic Inflammatory Response, Health Behavior, Dietary Habits, Physical Inactivity, Self Efficacy, Gut Microbiota, Diabetes Mellitus
Interventions
HomeStyles-China
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
30 Years to 70 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Oct 4, 2026, 9:36 AM EDT