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ClinicalTrials.gov public records Last synced Oct 20, 2026, 5:51 AM EDT

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Showing 121–144 of 985 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Microbiome Clear all
Recruiting Phase 2 Interventional

Microbiome and Association With Implant Infections

NCT05020574
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Genetic Predisposition to Disease
Interventions
Cephalexin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Walnuts and Colon Health (The WellNut Trial)

NCT05195970
View directory record Official record
Conditions
Colorectal Cancer, Diet Habit
Interventions
Walnuts
Other
Lead sponsor
UConn Health
Other
Eligibility
39 Years to 75 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
2
States / cities
Farmington, Connecticut • New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Role of the Gut Microbiome on Lean Mass and Physical Function in Older Adults

NCT02811445
View directory record Official record
Conditions
Sarcopenia
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
70 Years to 85 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 6, 2020 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Red Raspberry Polyphenols on Gut Microbiome

NCT03049631
View directory record Official record
Conditions
Healthy Subjects, Pre-diabetes
Interventions
Raspberry and fructooligosaccharide, Raspberry
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
20 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 14, 2020 · Synced Oct 20, 2026, 5:51 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Reducing Metabolic Dysregulation in Dyads

NCT06117241
View directory record Official record
Conditions
Colorectal Cancer, Inflammation, Nutrition Related Cancer
Interventions
IMAGINE HEALTHY
Behavioral
Lead sponsor
University of South Carolina
Other
Eligibility
9 Years to 55 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Particle Size Project

NCT05091801
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 14, 2022 · Synced Oct 20, 2026, 5:51 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 8, 2022 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Mushroom Blend on Gastrointestinal Symptoms and the Microbiome

NCT07027462
View directory record Official record
Conditions
Healthy
Interventions
Mushroom blend, Placebo
Dietary Supplement · Other
Lead sponsor
University of South Carolina
Other
Eligibility
30 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Terminated Not applicable Interventional

Effects of Flourish HEC Vaginal Care System on Birth-Related Pelvic Floor Disorders

NCT05665569
View directory record Official record
Conditions
Pelvic Floor Disorders
Interventions
Flourish HEC, which contains BioNourish, Routine pelvic physical therapy
Device · Other
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Bellaire, Texas
Source: ClinicalTrials.gov public record
Updated Jul 18, 2023 · Synced Oct 20, 2026, 5:51 AM EDT
Recruiting Not applicable Interventional

Poi for Mama: a Pilot to Improve Maternal Microbiome and Gestational Diabetes Risk

NCT07446205
View directory record Official record
Conditions
Gestational Diabetes Mellitus (GDM), Pregnancy
Interventions
Fermented Poi
Other
Lead sponsor
University of Hawaii
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
3
States / cities
Honolulu, Hawaii • Waimanalo, Hawaii
Source: ClinicalTrials.gov public record
Updated Jul 2, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Active, not recruiting No phase listed Observational

Leveraging Artificial Intelligence and Multi-Omics Data to Predict Opioid Addiction

NCT06540105
View directory record Official record
Conditions
Opioid Use Disorder, Addiction, Opioid
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Recruiting Not applicable Interventional

The Influence of Feeding Source on the Gut Microbiome and Time to Full Feeds in Neonates With Congenital Gastrointestinal Pathologies

NCT06072976
View directory record Official record
Conditions
Gastrointestinal Complication, Intestinal Obstruction, Gastroschisis, Hirschsprung Disease, Omphalocele, Midgut Volvulus
Interventions
Standard of Care, Exclusive Human Milk
Dietary Supplement
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
0 Days to 55 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Aimmune Longitudinal Collaboration Study

NCT07218640
View directory record Official record
Conditions
Stool Spore Colony Forming Units, Microbiome Composition, Dietary Fiber, Stress
Interventions
Chia seeds
Other
Lead sponsor
Aimmune Therapeutics, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
2
States / cities
Ambler, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Oct 20, 2026, 5:51 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Azithromycin Treatment for the Airway Microbiome in Asthma

NCT03736629
View directory record Official record
Conditions
Asthma Chronic
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 55 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 23, 2023 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational

Insights Into Microbiome and Environmental Contributions to Sickle Cell Disease and Leg Ulcers Study (INSIGHTS Study)

NCT02156102
View directory record Official record
Conditions
Genetic Disease, Genomics
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
18 Years to 120 Years
Enrollment
405 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2024
U.S. locations
2
States / cities
Bethesda, Maryland • The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional

The Inflammatory Bowel Disease - Anti-Inflammatory Diet (IBD-AID)

NCT04757181
View directory record Official record
Conditions
Inflammatory Bowel Diseases
Interventions
The IBD-AID
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
15 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome-mediated Weight, Anxiety, and Stress Dysregulation in Anorexia Nervosa

NCT03119272
View directory record Official record
Conditions
Anorexia Nervosa
Interventions
Not listed
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
15 Years to 45 Years · Female only
Enrollment
255 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 23, 2020 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Aspirin on Gut Microbiome

NCT02761486
View directory record Official record
Conditions
Healthy
Interventions
Aspirin, Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 26, 2020 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational

Effect of Radiotherapy Variables on Circulating Effectors of Immune Response and Local Microbiome

NCT03383107
View directory record Official record
Conditions
Breast Cancer, Prostate Cancer
Interventions
Not listed
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 90 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 12, 2022 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Not applicable Interventional

Study of Probiotic Use After Childbirth in Relation to Emotional Well-Being

NCT04472065
View directory record Official record
Conditions
Mental Health Wellness
Interventions
Lactobacillus reuteri, Placebo
Dietary Supplement · Other
Lead sponsor
Elizabeth Austen Lawson
Other
Eligibility
18 Years and older · Female only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 25, 2023 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Oropharynx (OPX) Salivary Biomarker Study

NCT05093400
View directory record Official record
Conditions
Healthy
Interventions
no intervention
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 100 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 7, 2023 · Synced Oct 20, 2026, 5:51 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Mortality Reduction After Oral Azithromycin: Morbidity Study

NCT02048007
View directory record Official record
Conditions
Childhood Mortality
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
1 Month and older
Enrollment
72,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
2
States / cities
San Francisco, California • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Oct 20, 2026, 5:51 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

The Sinonasal Microbiome

NCT06822725
View directory record Official record
Conditions
Sinonasal Disorder, Chronic Rhinosinusitis (Diagnosis)
Interventions
Control Group, Chronic rhinosinusitis (CRS) with and without Nasal Polyposis
Other · Procedure
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Enrollment
285 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Hyde Park, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Oct 20, 2026, 5:51 AM EDT
Completed No phase listed Observational

Targeting Diet-Microbiome Interactions in the Pathogenesis of Parkinson's Disease

NCT03705520
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
Rush University Medical Center
Other
Eligibility
40 Years to 80 Years
Enrollment
106 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 12, 2023 · Synced Oct 20, 2026, 5:51 AM EDT