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ClinicalTrials.gov public records Last synced Oct 20, 2026, 3:52 PM EDT

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Showing 265–288 of 985 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Microbiome Clear all
Completed No phase listed Observational

The Effect of the Microbiome on Immune Checkpoint Inhibitor Response in Melanoma Patients

NCT05102773
View directory record Official record
Conditions
Clinical Stage IV Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8
Interventions
Biospecimen Collection, Computed Tomography, Laboratory Biomarker Analysis, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older
Enrollment
88 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 24, 2023 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Taste Perception, Salivary Proteins & the Oral Microbiome

NCT04107688
View directory record Official record
Conditions
Saliva Altered, Taste, Altered
Interventions
Control, CPE
Other
Lead sponsor
Rutgers University
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 14, 2024 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Impact of Overnight Active Temperature Regulation on Gut Microbiome, Inflammation, and Circadian Rhythm.

NCT07848594
View directory record Official record
Conditions
Poor Sleep Quality, Gut Microbiome, Gut Health, Inflammation, Circadian Rhythm, Circadian Clocks, Gut Microbiota, Women's Health, Gut-Brain Axis, Blood Pressure, Systemic Inflammatory Response
Interventions
Overnight Active Temperature Regulation: Eight Sleep Pod System
Device
Lead sponsor
Eight Sleep Inc.
Industry
Eligibility
45 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Newton Center, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Concord Grape Polyphenol-soy Protein Isolate Complex (GP-SPI) on Gut Microbiota

NCT04018066
View directory record Official record
Conditions
Mechanisms, Defense
Interventions
GP-SPI
Dietary Supplement
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 35 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 18, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Not applicable Interventional

Prebiotic Inulin for Late-Reproductive Individuals

NCT07724522
View directory record Official record
Conditions
Obesity & Overweight, Perimenopausal Women, Prebiotics, Inulin, Muscle, Skeletal, Cardiovascular Diseases (CVD), Microbiota, Gastrointestinal Microbiome, Dietary Fiber, Women Health, Vascular Health, Insulin Resistance
Interventions
Inulin, Maltodextrin (Placebo)
Dietary Supplement
Lead sponsor
George Washington University
Other
Eligibility
40 Years to 55 Years · Female only
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional

The Effect of Increasing Dietary Protein on the Gut Microbiome and Its Metabolites

NCT06677333
View directory record Official record
Conditions
Health Adults
Interventions
Whey Protein, Pea protein
Other
Lead sponsor
Louisiana State University Health Sciences Center in New Orleans
Other
Eligibility
25 Years and older
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 6, 2024 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Phase 2 Interventional

Combined Oral Contraceptive Pill and Resistance Starch

NCT06852365
View directory record Official record
Conditions
Metabolic Syndrome, Polycystic Ovary Syndrome
Interventions
wheat dextrin, Oral Contraceptives, Low-Dose, Maltodextrin
Dietary Supplement · Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Sample Collection From Healthy Volunteers for Assay Optimization

NCT03538600
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years to 80 Years
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2043
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 2, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pulse Biomarker Discovery

NCT04887584
View directory record Official record
Conditions
Body Weight
Interventions
Control diet, Low Pulse diet, High Pulse diet
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Oct 26, 2024 · Synced Oct 20, 2026, 3:52 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Characterization of Adults for Asthma Microbiome Research Studies

NCT02887911
View directory record Official record
Conditions
Asthma, Healthy
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 75 Years
Enrollment
171 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 20, 2022 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Phase 1Phase 2 Interventional

Fecal Microbiota Transplantation for Chronic Granulomatous Disease-Associated Colitis

NCT05333471
View directory record Official record
Conditions
Chronic Granulomatous Disease-associated Colitis
Interventions
MTP 101-LF
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
10 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Corn and Heart Health Study

NCT03967990
View directory record Official record
Conditions
Gut Microbiome, Cholesterol, LDL, Cholesterol, HDL
Interventions
Refined cornmeal flour, 50/50 refined cornmeal-bran mix, Whole grain cornmeal flour
Other
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 70 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Feb 5, 2024 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Effect Cranberry-Based Products on the Female Microbiome

NCT07109713
View directory record Official record
Conditions
Vaginal Microbiome, Gut Microbiome, Gut Health
Interventions
Active, Placebo
Dietary Supplement
Lead sponsor
Ocean Spray Cranberries, Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 14, 2025 · Synced Oct 20, 2026, 3:52 PM EDT
Active, not recruiting No phase listed Observational

Microbiome and Immunosuppression: The Mission Study

NCT04953715
View directory record Official record
Conditions
Kidney Transplant Rejection, Kidney Transplant
Interventions
collection of body microbiome
Other
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2033
U.S. locations
2
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting Not applicable Interventional

Fiber Smoothie Supplement

NCT06896240
View directory record Official record
Conditions
Total Knee Arthroplasty Revision, Inflammatory Markers, Gut Microbiota
Interventions
Assigned Interventions
Dietary Supplement
Lead sponsor
Hospital for Special Surgery, New York
Other
Eligibility
40 Years to 80 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Phase 4 Interventional Results available

Mirabegron and Urinary Urgency Incontinence

NCT02495389
View directory record Official record
Conditions
Overactive Bladder
Interventions
Mirabegron
Drug
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 13, 2020 · Synced Oct 20, 2026, 3:52 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Microbiome Dysfunction in Surgical Intensive Care Unit Survivors

NCT05357170
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Analysis of the Microbiome in Rosacea

NCT04108897
View directory record Official record
Conditions
Rosacea
Interventions
Doxycycline, Ivermectin Topical
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 99 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Results available

Gut Microbiome and p-Inulin in Hemodialysis

NCT02572882
View directory record Official record
Conditions
End-Stage Renal Disease, Gut Microbiome Dysbiosis
Interventions
p-inulin
Dietary Supplement
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 85 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
4
States / cities
Washington D.C., District of Columbia • Boston, Massachusetts • Nashville, Tennessee + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 20, 2022 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Implementing Good Nutrition to Improve, Transform, and Enhance (IGNITE) Firefighters' Health

NCT06567561
View directory record Official record
Conditions
Cancer, Inflammation, Microbiome, Immune Function
Interventions
Whole Foods Plant-Based Diet, Usual Firehouse Diet
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
121 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Oral Fructanase Administration on Gastrointestinal Symptoms After Inulin Challenge in Healthy Adults

NCT06628869
View directory record Official record
Conditions
Digestive Health, Gastrointestinal Health, FODMAP Intolerance, Food Sensitivity
Interventions
Fructanase, Maltodextrin placebo
Dietary Supplement
Lead sponsor
BIO-CAT, Inc.
Industry
Eligibility
20 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Not applicable Interventional

Effects of Flourish on Recurrent Urinary Tract Infection

NCT05397782
View directory record Official record
Conditions
Urinary Tract Infections
Interventions
BioNourish, a component of Flourish HEC
Device
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years to 52 Years · Female only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 7, 2024 · Synced Oct 20, 2026, 3:52 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Lipidome and Microbiome Profile of the Eye in Rosacea

NCT03655197
View directory record Official record
Conditions
Rosacea, Ocular Rosacea, Cutaneous Rosacea
Interventions
Doxycycline
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2023 · Synced Oct 20, 2026, 3:52 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Lung HIV Microbiome Project (Michigan Site)

NCT02392182
View directory record Official record
Conditions
Healthy Participants, Tobacco Use Disorder, Human Microbiome
Interventions
Fiberoptic bronchoscopy
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 80 Years
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 16, 2016 · Synced Oct 20, 2026, 3:52 PM EDT