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ClinicalTrials.gov public records Last synced Oct 23, 2026, 1:01 AM EDT

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Showing 409–432 of 1,015 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Microbiome Clear all
Completed No phase listed Observational Accepts healthy volunteers

Microbiome and Mycobiome Registry of Volunteers With and Without Autism Spectrum Disorder

NCT03819439
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
Microbiome and Autism Questionnaire
Other
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
2 Years and older
Enrollment
74 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 30, 2019 · Synced Oct 23, 2026, 1:01 AM EDT
Recruiting Not applicable Interventional

Microbiome-targeted Diet Therapy in Ulcerative Colitis

NCT07520461
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
High Protein, High Fiber (HPHF) Diet
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 20, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Not listed No phase listed Observational

Predicting Chronic Opioid Use Following Lower Extremity Joint Arthroplasty

NCT04974463
View directory record Official record
Conditions
Joint Pain, Chronic Pain, Opioid Use
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 27, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

A Study to Explore the Role of Gut Flora in COVID-19 Infection

NCT04359836
View directory record Official record
Conditions
Gut Microbiome, Gastrointestinal Microbiome, COVID, COVID-19, Corona Virus Infection, Coronavirus, Coronaviridae Infections, Coronavirus 19, Coronavirus-19, COVID 19
Interventions
There is no intervention in this study
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Microbiome Effect of Omadacycline on Healthy Volunteers

NCT06030219
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Omadacycline, Vancomycin Pill, Moxifloxacin
Drug
Lead sponsor
University of Houston
Other
Eligibility
18 Years to 40 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 25, 2025 · Synced Oct 23, 2026, 1:01 AM EDT
Enrolling by invitation Not applicable Interventional

Glycemic Impact of NNS Via the Gut Microbiome

NCT07868432
View directory record Official record
Conditions
Prediabetes
Interventions
Sucralose
Dietary Supplement
Lead sponsor
Tufts University
Other
Eligibility
35 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 9, 2026 · Synced Oct 23, 2026, 1:01 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 4, 2020 · Synced Oct 23, 2026, 1:01 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pulmonary Inflammation and Microbiome Changes With Bariatric Surgery in Obese Asthma

NCT04247971
View directory record Official record
Conditions
Asthma, Obesity
Interventions
Blood draw, Sputum collection, Pulmonary function test
Procedure
Lead sponsor
Duke University
Other
Eligibility
21 Years to 60 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Anti-inflammatory Effect and Associated Mechanisms of Mango Consumption

NCT04726293
View directory record Official record
Conditions
Overweight or Obesity, Healthy
Interventions
Mango, Control
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
20 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 11, 2025 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mediterranean Diet and the Gut Microbiome

NCT03269032
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 22, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A 4-week Study Investigating Two Targeted Brightening Serum (A and B) Versus 4% Hydroquinone in Women With Mild to Severe Full-face Hyperpigmentation

NCT07644871
View directory record Official record
Conditions
Hyperpigmentation, Melasma, Dark Spots
Interventions
Facial Cleanser, Facial Moisturizer, Sunscreen SPF 55
Other
Lead sponsor
Revision Skincare
Industry
Eligibility
20 Years to 60 Years · Female only
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Irving, Texas
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Completed No phase listed Observational

Deciphering the Mechanisms Involved in Microbial Translocation Across the Spectrum of HCV Associated Liver Fibrosis

NCT02400216
View directory record Official record
Conditions
Cirrhosis
Interventions
dual cholate
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Not listed No phase listed Observational

Microbiome in Immunotherapy naïve NSCLC Patients Receiving PD-1/L1 Blockade (MIP_NSCLC)

NCT04636775
View directory record Official record
Conditions
NSCLC Stage IV, NSCLC, Recurrent
Interventions
Microbiome
Diagnostic Test
Lead sponsor
Jun Zhang, MD, PhD
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
3
States / cities
Fairway, Kansas • Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Dec 11, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Completed No phase listed Observational

The Human Microbiome and IVF Outcomes

NCT03637777
View directory record Official record
Conditions
Infertility
Interventions
16S rRNA gene sequencing
Diagnostic Test
Lead sponsor
Reproductive Medicine Associates of New Jersey
Other
Eligibility
18 Years to 45 Years
Enrollment
332 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Basking Ridge, New Jersey
Source: ClinicalTrials.gov public record
Updated May 3, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

GI Tract Biomarkers in Infants With Different Diets

NCT03751137
View directory record Official record
Conditions
Obesity, Childhood
Interventions
Not listed
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Weeks to 3 Months
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2025
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 4, 2025 · Synced Oct 23, 2026, 1:01 AM 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 23, 2026, 1:01 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vaginal Microbiome and IVF Pregnancy Outcome

NCT05150639
View directory record Official record
Conditions
Vaginal Flora Imbalance
Interventions
IVF
Other
Lead sponsor
Freya Biosciences ApS
Industry
Eligibility
18 Years to 44 Years · Female only
Enrollment
301 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waltham, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 2, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flourish Vaginal Care System to Establish Neovaginal Microbiome

NCT05372770
View directory record Official record
Conditions
Neovaginal Microbiome
Interventions
Flourish Vaginal Care system
Device
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
New Hope, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Oct 23, 2026, 1:01 AM EDT
Withdrawn Not applicable Interventional

Microbiome Modification to Enhance Stelara Response in Crohn's Disease

NCT04795960
View directory record Official record
Conditions
Crohn Disease
Interventions
Low serine diet, High serine diet
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 12, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Withdrawn Phase 2 Interventional

Evaluation of the Kinetic Properties of an Autologous Microbiome Transplant in Adult Atopic Dermatitis Patients

NCT02144142
View directory record Official record
Conditions
Atopic Dermatitis, Eczema
Interventions
Moisturizer with each subject's own antimicrobial bacteria
Biological
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 5, 2020 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessing Uniqueness of Inflammatory Bowel Disease Related Microbiome-derived Biomarkers

NCT05640583
View directory record Official record
Conditions
Irritable Bowel Disease
Interventions
Hygieacare System
Device
Lead sponsor
HyGIeaCare, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 27, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Completed Not applicable Interventional

Esophageal Atresia: a Natural Experiment of the Effects of Oral Inoculation on the Gut Microbiome

NCT04901546
View directory record Official record
Conditions
Esophageal Atresia
Interventions
Patient's own saliva
Other
Lead sponsor
Stanford University
Other
Eligibility
Up to 3 Months
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Apr 13, 2023 · Synced Oct 23, 2026, 1:01 AM EDT
Recruiting Not applicable Interventional

Effects of Urolithin A Supplementation on Glucose Metabolism in Healthy Adults 55 >= Years Old: A Randomized Triple-Masked Controlled Clinical Trial

NCT06274749
View directory record Official record
Conditions
Healthy Volunteer
Interventions
Urolithin A, Placebo
Dietary Supplement
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
55 Years to 100 Years
Enrollment
180 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 22, 2026 · Synced Oct 23, 2026, 1:01 AM EDT
Recruiting Phase 1Phase 2 Interventional

Snacks and Brain Health

NCT07348406
View directory record Official record
Conditions
Cognitive Assessment, Psychological Function, GI Health
Interventions
Pecan snack, Pretzel snack
Biological
Lead sponsor
Texas Tech University Health Sciences Center
Other
Eligibility
50 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Sep 8, 2026 · Synced Oct 23, 2026, 1:01 AM EDT