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ClinicalTrials.gov public records Last synced May 21, 2026, 7:16 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 936 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Microbiome Clear all
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Microbial Colonization
Interventions
High arabinose diet
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced May 21, 2026, 7:16 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Pregnancy Related, Microbiome, Immune Function, Inflammation
Interventions
Fiber, Fermented Foods
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Test if Increased Chewing Will Increased Microbiota SCFA Production
Interventions
Intervention
Behavioral
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 13, 2022 · Synced May 21, 2026, 7:16 PM EDT
Enrolling by invitation No phase listed Observational
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS), Celiac Disease, Diarrhea, Constipation, Microbiome, Crohn's Disease, UC - Ulcerative Colitis, Microscopic Colitis, Functional Dyspepsia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
4,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced May 21, 2026, 7:16 PM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Psoriatic Plaque
Interventions
KBL697
Drug
Lead sponsor
KoBioLabs
Industry
Eligibility
18 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
6
States / cities
Birmingham, Alabama • Santa Ana, California • Santa Monica, California + 3 more
Source: ClinicalTrials.gov public record
Updated Jan 6, 2025 · Synced May 21, 2026, 7:16 PM EDT
Active, not recruiting Not applicable Interventional
View directory record Official record
Conditions
Crohn's Disease
Interventions
Specific carbohydrate diet, Elemental diet
Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced May 21, 2026, 7:16 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Aging
Interventions
Western Diet, Non-Western Diet
Other
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years to 79 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Oct 27, 2021 · Synced May 21, 2026, 7:16 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Amputation With Osseointegration
Interventions
Collection of biologic samples and data
Other
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2029
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced May 21, 2026, 7:16 PM EDT
Terminated No phase listed Observational
View directory record Official record
Conditions
Renal Transplant
Interventions
Stool Specimen Collection, Anal Swab Sampling, Short Diet Assessment (SDA), NHANES Dietary Screener Questionnaire (DSQ)
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 25, 2024 · Synced May 21, 2026, 7:16 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
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 13, 2025 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Microbiome, Immune Function, Cardiovascular Diseases
Interventions
Meat products, Plant Alternative products
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
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 13, 2024 · Synced May 21, 2026, 7:16 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Diabetes, Heart Diseases, Diet Habit, Diet Modification, Healthy, Obesity, Metabolism, Microbial Colonization
Interventions
Dietary Intervention
Other
Lead sponsor
Zoe Global Limited
Other
Eligibility
18 Years and older
Enrollment
250,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2030
U.S. locations
1
States / cities
Needham, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 15, 2025 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Diet Intervention
Interventions
Personalized diet, Conventional dietary advice
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 35 Years
Enrollment
112 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 14, 2025 · Synced May 21, 2026, 7:16 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Breast Neoplasms
Interventions
Biospecimen Collection, Electronic Health Record Review, Questionnaire Administration
Procedure · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 17, 2025 · Synced May 21, 2026, 7:16 PM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
HIV Infections, COPD, Microbiome
Interventions
Not listed
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 2, 2025 · Synced May 21, 2026, 7:16 PM EDT
Recruiting Phase 4 Interventional
View directory record Official record
Conditions
Skin Pigmentation
Interventions
Almond Oil, Hydroquinone Topical
Other · Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced May 21, 2026, 7:16 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stress Response, Mental Stress, Multitasking Behavior and Multitasking Ability, Physiological Stress, Cognitive Symptoms, Motor Activity
Interventions
Cranberry juice, Placebo juice
Other
Lead sponsor
University of Florida
Other
Eligibility
30 Years to 55 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced May 21, 2026, 7:16 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Nontuberculous Mycobacteria, Bronchiectasis
Interventions
Bronchoscopy
Procedure
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2031
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
American Diet, Mediterranean-style Diet
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 21, 2023 · Synced May 21, 2026, 7:16 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Diarrhoea Predominant Irritable Bowel Syndrome, IBS
Interventions
endoscopy for tissue biopsy, Blood Sample, Stool Sample
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Scottsdale, Arizona
Source: ClinicalTrials.gov public record
Updated Jul 6, 2017 · Synced May 21, 2026, 7:16 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
NSCLC, Stage III, Locally Advanced Lung Carcinoma
Interventions
Not listed
Lead sponsor
Jun Zhang, MD, PhD
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
2
States / cities
Kansas City, Kansas • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated May 7, 2024 · Synced May 21, 2026, 7:16 PM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Study of humoral immunity
Diagnostic Test
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 40 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced May 21, 2026, 7:16 PM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Celiac Disease
Interventions
Not listed
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
Up to 6 Months
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 16, 2026 · Synced May 21, 2026, 7:16 PM EDT