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ClinicalTrials.gov public records Last synced Jul 23, 2026, 4:32 AM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Microbiome Clear all
Completed Early Phase 1 Interventional

Rifaximin for Infection Prophylaxis in Hematopoietic Stem Cell Transplantation

NCT03529825
View directory record Official record
Conditions
Microbial Colonization
Interventions
Rifaximin
Drug
Lead sponsor
Emory University
Other
Eligibility
2 Years to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 11, 2021 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis

NCT04118010
View directory record Official record
Conditions
Cystic Fibrosis, Dysbiosis
Interventions
Vitamin D3, Placebo vitamin D3, Inulin, Placebo Inulin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Jul 23, 2026, 4:32 AM EDT
Suspended Not applicable Interventional

The Effect of Diet and Exercise on ImmuNotherapy and the Microbiome (EDEN)

NCT04866810
View directory record Official record
Conditions
Melanoma
Interventions
Intervention Arm, Control
Behavioral
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 120 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
2
States / cities
Loma Linda, California • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 26, 2026 · Synced Jul 23, 2026, 4:32 AM EDT
Withdrawn No phase listed Observational

Comparison of Microbiome Composition and Biomarkers in Pharmaco Resistant and Pharmaco-Sensitive Epilepsy

NCT04308252
View directory record Official record
Conditions
Epilepsy in Children, Pharmaco-Resistant Epilepsy
Interventions
Not listed
Lead sponsor
Senda Biosciences
Industry
Eligibility
1 Year to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 25, 2021 · Synced Jul 23, 2026, 4:32 AM EDT
Terminated No phase listed Observational

A Study to Investigate Cystic Fibrosis Pulmonary Exacerbations and the Lung Microbiome

NCT05088447
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Not listed
Lead sponsor
Stanford University
Other
Eligibility
Up to 22 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Jul 23, 2026, 4:32 AM EDT
Completed No phase listed Observational

Role of Exogenous and Endogenous Sex Hormones on Tenofovir and Emtricitabine Disposition in Female Genital Tract

NCT03218085
View directory record Official record
Conditions
HIV/AIDS, Menopause, Inflammation Vagina
Interventions
Tenofovir, Emtricitabine
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older · Female only
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2024
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 15, 2024 · Synced Jul 23, 2026, 4:32 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Microbiome and Axial Spondyloarthritis

NCT04713995
View directory record Official record
Conditions
Axial Spondyloarthritis
Interventions
Dietary recommendations
Other
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jul 7, 2022 · Synced Jul 23, 2026, 4:32 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

The Influence of Gonadal Hormone Suppression on Adipocyte Lineage and the Microbiome

NCT03396978
View directory record Official record
Conditions
Adipose Tissue, Microbiome, Menopause
Interventions
GnRHag
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Jul 23, 2026, 4:32 AM 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 Jul 23, 2026, 4:32 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Food and Microbiome Longitudinal Investigation (FAMiLI)

NCT03293758
View directory record Official record
Conditions
Cancer, Cardiovascular Diseases
Interventions
Not listed
Lead sponsor
NYU Langone Health
Other
Eligibility
40 Years and older
Enrollment
16,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2034
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Jul 23, 2026, 4:32 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Long-Acting Progestin Contraception and the Vaginal Microbiome

NCT02740998
View directory record Official record
Conditions
Sexually Transmitted Infection
Interventions
Not listed
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
2
States / cities
Boston, Massachusetts • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional

Flourish HEC to Prevent Recurrence of BV

NCT05386147
View directory record Official record
Conditions
Bacterial Vaginosis
Interventions
Flourish HEC Vaginal Care System (contains a class II medical device plus other unregulated components)
Device
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years to 52 Years · Female only
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Rosemont, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 7, 2024 · Synced Jul 23, 2026, 4:32 AM EDT
Active, not recruiting No phase listed Observational

Hypoglycemia and the Gut Microbiome

NCT03385707
View directory record Official record
Conditions
Hypoglycemia
Interventions
Not listed
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 65 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 5, 2026 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional

Tolerability Study of a Novel Microbiome Therapeutic in Subjects With Gastroesophageal Reflux Disease

NCT04491734
View directory record Official record
Conditions
Gastroesophageal Reflux
Interventions
maltosyl-isomalto-oligosaccharides (MIMO)
Dietary Supplement
Lead sponsor
ISOThrive Inc.
Industry
Eligibility
25 Years to 75 Years
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Manassas, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 29, 2021 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Phase 2 Interventional Results available

Inulin for Infections in the Intensive Care Unit

NCT03865706
View directory record Official record
Conditions
Antibiotic Resistant Infection, Nosocomial Infection, Pathogen Transmission, Nutrition Disorders, Critical Illness, Sepsis
Interventions
Inulin Oral Suspension, Placebo Oral Suspension, Broad-spectrum antibiotics
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional Results available

A Dietary Intervention Study on the Microbiome in Crohn's Disease Patients

NCT04065048
View directory record Official record
Conditions
Crohn Disease
Interventions
Soy based diet, Non-soy based diet
Other
Lead sponsor
Case Western Reserve University
Other
Eligibility
18 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional

The Effects of Mindfulness-based Stress Reduction in Interstitial Cystitis Patients

NCT03722992
View directory record Official record
Conditions
Interstitial Cystitis
Interventions
MBSR
Other
Lead sponsor
TriHealth Inc.
Other
Eligibility
18 Years and older · Female only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 22, 2020 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pubic Hair and the Urinary and Vaginal Microbiome

NCT03272204
View directory record Official record
Conditions
Healthy
Interventions
No pubic hair, Pubic Hair
Behavioral
Lead sponsor
Margaret Mueller
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Kombucha Consumption on the Microbiome in Healthy Subjects

NCT06484504
View directory record Official record
Conditions
Health Behavior
Interventions
Kombucha beverage
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 55 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 2, 2024 · Synced Jul 23, 2026, 4:32 AM EDT
Completed No phase listed Observational

Reproducibility of a Fecal Occult Blood Test Device for Gut Microbiota Analyses

NCT01194687
View directory record Official record
Conditions
Normal Physiology
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 99 Years
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2018
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 17, 2018 · Synced Jul 23, 2026, 4:32 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Gut Microbiota Composition in Hispanic and Non-Hispanic Children.

NCT03990350
View directory record Official record
Conditions
Obesity
Interventions
Fecal Sample Collection, Physical Activity Questionnaire, Food Frequency Questionnaire, 24-hour dietary recall diary
Other
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Years to 12 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Jul 23, 2026, 4:32 AM EDT
Withdrawn No phase listed Observational

Metabiomics Colon Cancer Clinical Research Study

NCT02151123
View directory record Official record
Conditions
Colonic Neoplasms
Interventions
Not listed
Lead sponsor
Metabiomics Corp
Industry
Eligibility
18 Years to 95 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Jul 23, 2026, 4:32 AM EDT
Enrolling by invitation No phase listed Observational

Studies of the Human Microbiome in Clinical Center Patients

NCT01933620
View directory record Official record
Conditions
Multidrug-resistant Colonization
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
2 Years to 120 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2014
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Jul 23, 2026, 4:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mediterranean-like Unprocessed (CLEAN-MED) Diet Intervention Study of the Gut Microbiome of Healthy Adults

NCT05411120
View directory record Official record
Conditions
Diet Therapy
Interventions
Western Diet, CLEAN-MED
Other
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 60 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Jul 23, 2026, 4:32 AM EDT