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ClinicalTrials.gov public records Last synced Oct 22, 2026, 10:41 PM EDT

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Showing 361–384 of 1,015 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Microbiome Clear all
Completed Phase 2 Interventional

The Female Microbiome in Patients Undergoing Bladder Instillation Therapy

NCT05414305
View directory record Official record
Conditions
Interstitial Cystitis, Bladder Pain Syndrome, Microbial Colonization
Interventions
Heparin & Alkalinized Lidocaine Bladder Instillation
Drug
Lead sponsor
Walter Reed National Military Medical Center
Federal
Eligibility
18 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 14, 2024 · Synced Oct 22, 2026, 10:41 PM EDT
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 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Stool Microbiome Using HyGIeaCare Prep

NCT04264923
View directory record Official record
Conditions
Stool Microbiome
Interventions
HyGIeaCare Prep
Other
Lead sponsor
HyGIeaCare, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 31, 2020 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Phase 4 Interventional Results available

Investigation of the Effect of the Female Urinary Microbiome on Incontinence

NCT02835846
View directory record Official record
Conditions
Overactive Bladder, Incontinence, Nocturia
Interventions
Estrogen Cream
Drug
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 23, 2021 · Synced Oct 22, 2026, 10:41 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Successful Fiber Food Introduction in Short Bowel Syndrome

NCT06240065
View directory record Official record
Conditions
Short Gut Syndrome
Interventions
Green bean puree
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
4 Months to 17 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2025 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Microbiome Derived Metabolism and Pharmacokinetics

NCT05065671
View directory record Official record
Conditions
Microbial Colonization
Interventions
Tolcapone 100 MG, Duloxetine 20 MG
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Somerville, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Oct 22, 2026, 10:41 PM EDT
Terminated Phase 1Phase 2 Interventional

Effects of Probiotic on Inflammation and Microbiota in Patients With NASH

NCT03511365
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease, Probiotics MeSH Descriptor Data 2018, Interleukin-17 MeSH Descriptor Data 2018
Interventions
Probiotic Formulation VSL#3
Biological
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Jan 7, 2020 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Trial of Theracurmin for Patients With Amyotrophic Lateral Sclerosis (ALS)

NCT04499963
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis
Interventions
Theracurmin HP
Drug
Lead sponsor
Richard Bedlack, M.D., Ph.D.
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 28, 2023 · Synced Oct 22, 2026, 10:41 PM EDT
Recruiting Not applicable Interventional

A Pilot Study Examining Low Sulfur Diet as Treatment for Persistent Symptoms in Quiescent Crohn's Disease

NCT05849012
View directory record Official record
Conditions
Crohn's Disease in Remission
Interventions
Low Sulfur Diet, Usual Diet
Other
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Oct 22, 2026, 10:41 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

The Effect of Therapeutic Fecal Transplant on the Gut Microbiome in Children With Ulcerative Colitis

NCT02291523
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
Fecal Microbial Transplant
Biological
Lead sponsor
Children's Hospital Los Angeles
Other
Eligibility
7 Years to 21 Years
Enrollment
101 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 2, 2023 · Synced Oct 22, 2026, 10:41 PM EDT
Recruiting Phase 1 Interventional

Role of Gut Microbiome and Fecal Transplant on Medication-Induced GI Complications in Patients With Cancer

NCT03819296
View directory record Official record
Conditions
Clinical Stage 0 Cutaneous Melanoma AJCC v8, Clinical Stage I Cutaneous Melanoma AJCC v8, Clinical Stage IA Cutaneous Melanoma AJCC v8, Clinical Stage IB Cutaneous Melanoma AJCC v8, Clinical Stage II Cutaneous Melanoma AJCC v8, Clinical Stage IIA Cutaneous Melanoma AJCC v8, Clinical Stage IIB Cutaneous Melanoma AJCC v8, Clinical Stage IIC Cutaneous Melanoma AJCC v8, Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Colitis, Lung Non-Small Cell Carcinoma, Malignant Genitourinary System Neoplasm, Malignant Solid Neoplasm, Pathologic Stage 0 Cutaneous Melanoma AJCC v8, Pathologic Stage I Cutaneous Melanoma AJCC v8, Pathologic Stage IA Cutaneous Melanoma AJCC v8, Pathologic Stage IB Cutaneous Melanoma AJCC v8, Pathologic Stage II Cutaneous Melanoma AJCC v8, Pathologic Stage IIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIC Cutaneous Melanoma AJCC v8, Pathologic Stage III Cutaneous Melanoma AJCC v8, Pathologic Stage IIIA Cutaneous Melanoma AJCC v8, Pathologic Stage IIIB Cutaneous Melanoma AJCC v8, Pathologic Stage IIIC Cutaneous Melanoma AJCC v8, Pathologic Stage IIID Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8, Stage 0 Lung Cancer AJCC v8, Stage I Lung Cancer AJCC v8, Stage IA1 Lung Cancer AJCC v8, Stage IA2 Lung Cancer AJCC v8, Stage IA3 Lung Cancer AJCC v8, Stage IB Lung Cancer AJCC v8, Stage II Lung Cancer AJCC v8, Stage IIA Lung Cancer AJCC v8, Stage IIB Lung Cancer AJCC v8, Stage III Lung Cancer AJCC v8, Stage IIIA Lung Cancer AJCC v8, Stage IIIB Lung Cancer AJCC v8, Stage IIIC Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8, Stage IVA Lung Cancer AJCC v8, Stage IVB Lung Cancer AJCC v8
Interventions
Best Practice, Biospecimen Collection, Endoscopic Procedure, Fecal Microbiota Transplantation, Infliximab, Laboratory Biomarker Analysis, Prednisone, Vedolizumab
Other · Procedure · Biological + 1 more
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 15, 2026 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Mechanism of Microbiome-induced Insulin Resistance in Humans (Aim 1)

NCT02124759
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
Sevelamer, Synbiotic, Maltodextrin, High Fat diet, Low Fat diet
Drug · Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Oct 15, 2021 · Synced Oct 22, 2026, 10:41 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Contraceptive Hormones, Immunity, and Microbiome Evaluation

NCT03660046
View directory record Official record
Conditions
Hormonal Contraception
Interventions
Depot medroxyprogesterone acetate (DMPA), Etonogestrel implant (Eng-Implant), Levonorgestrel IUD (Lng-IUD)
Drug
Lead sponsor
Emory University
Other
Eligibility
Up to 45 Years · Female only
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
3
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 29, 2024 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Trimethylamine-N-oxide Production and Metabolism

NCT02558673
View directory record Official record
Conditions
Healthy
Interventions
TMAO dietary precursors, Control (or active comparator)
Other
Lead sponsor
Cornell University
Other
Eligibility
21 Years to 50 Years · Male only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
2
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Nov 2, 2016 · Synced Oct 22, 2026, 10:41 PM EDT
Completed No phase listed Observational

Microbiome Changes in Severe Burns

NCT03130868
View directory record Official record
Conditions
Burns Greater Than 20% BSAB, Burns
Interventions
Characterizing changes in the microbiome
Other
Lead sponsor
HealthPartners Institute
Other
Eligibility
17 Years to 120 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 1, 2018 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolic Response to Chardonnay Grape Marc Powder

NCT03203915
View directory record Official record
Conditions
Dyslipidemia, Obesity
Interventions
Chardonnay grape marc marc high polyphenol dose (120mg), Chardonnay grape marc powder low polyphenol dose (75mg), Placebo (0mg)
Dietary Supplement
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
35 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jul 16, 2021 · Synced Oct 22, 2026, 10:41 PM EDT
Completed No phase listed Observational

Microbiome and Immunologic Analysis - Women With Endometriosis

NCT04159740
View directory record Official record
Conditions
Endometriosis
Interventions
Tissue and blood collection
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Oct 22, 2026, 10:41 PM EDT
Terminated Not applicable Interventional Results available

Gut Microbiome & Gastrointestinal Toxicities as Determinants of Response to Neoadjuvant Chemo for Advanced Breast Cancer

NCT02696759
View directory record Official record
Conditions
Breast Cancer
Interventions
Blood & Fecal Collection
Other
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older · Female only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Mar 16, 2022 · Synced Oct 22, 2026, 10:41 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 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial Investigating if Antibiotic Use in the First 48 Hours of Life Adversely Impacts the Preterm Infant Microbiome

NCT02477423
View directory record Official record
Conditions
Premature Birth of Newborn, Enterocolitis, Necrotizing
Interventions
Ampicillin, Gentamicins, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
Up to 6 Hours
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Prolonged Fasting on Microbiome and HDL

NCT03487679
View directory record Official record
Conditions
Fasting
Interventions
Fasting
Other
Lead sponsor
University of California, Davis
Other
Eligibility
20 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 27, 2018 · Synced Oct 22, 2026, 10:41 PM EDT
Recruiting Not applicable Interventional

Enhanced Nutritional Optimization in LVAD Trial

NCT05655910
View directory record Official record
Conditions
Heart Failure, Gut Microbiome, Nutritional Deficiency
Interventions
Ensure Surgery Immunonutrition shake
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 22, 2026, 10:41 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hmong Microbiome ANd Gout, Obesity, Vitamin C (HMANGO-C)

NCT04938024
View directory record Official record
Conditions
Hyperuricemia, Gout
Interventions
Vitamin C
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Oct 22, 2026, 10:41 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Essential Oil-Based Product System for Digestive Support

NCT07653815
View directory record Official record
Conditions
Healthy
Interventions
essential oil supplement, Essential Oil, Placebo supplement, placebo essential oil
Dietary Supplement · Other
Lead sponsor
dōTERRA International
Industry
Eligibility
18 Years to 45 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Pleasant Grove, Utah
Source: ClinicalTrials.gov public record
Updated Jun 17, 2026 · Synced Oct 22, 2026, 10:41 PM EDT