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ClinicalTrials.gov public records Last synced Sep 2, 2026, 10:47 AM EDT

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Showing 1–24 of 995 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Microbiome Clear all
Completed Phase 2 Interventional

Multi-Center Study of Panosyl-Isomaltooligosaccharides Adjunctive to PPI Therapy to Treat GERD

NCT05556824
View directory record Official record
Conditions
Gastroesophageal Reflux
Interventions
MHS-1031, Placebo
Drug · Other
Lead sponsor
Microbiome Health Sciences
Industry
Eligibility
18 Years to 75 Years
Enrollment
255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
18
States / cities
Phoenix, Arizona • Los Angeles, California • Lake City, Florida + 13 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Active, not recruiting Not applicable Interventional Results available

Early Protein Supplementation in Extremely Preterm Infants Fed Human Milk

NCT04325308
View directory record Official record
Conditions
Prematurity; Extreme, Feeding Disorder Neonatal, Breast Milk Expression, Growth Failure, Microbial Colonization
Interventions
Protein-enriched human milk diet, Usual human milk diet
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 4 Days
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 2, 2026, 10:47 AM EDT
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 17, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Phase 2 Interventional Results available

Effects of the Probiotic Visbiome Extra Strength on Gut Microbiome & Immune Activation Markers

NCT02706717
View directory record Official record
Conditions
HIV-1 Infection
Interventions
Visbiome Extra Strength, Placebo
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
24
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 18 more
Source: ClinicalTrials.gov public record
Updated Jan 5, 2020 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

To Determine the Metabolomics and Microbiome Changes After Cranberry Juice Consumption Among Young Women

NCT02860468
View directory record Official record
Conditions
Healthy
Interventions
Cranberry juice, Placebo juice
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 29 Years · Female only
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 15, 2018 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Acetate and Age-associated Arterial Dysfunction

NCT05424263
View directory record Official record
Conditions
Aging, Vascular Stiffness, Vascular Dilation
Interventions
Calcium Acetate Oral Solution, Calcium Carbonate Oral Suspension
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
50 Years and older
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Exploratory Study of Circadian Relationships Between Social Behavior, Blood Pressure and Metabolomics

NCT02249793
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
25 Years to 35 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Completed No phase listed Observational

Environmental Health Effects on Your Physiology

NCT03986814
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years to 25 Years
Enrollment
92 participants
Timeline
2019 – 2022
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 8, 2024 · Synced Sep 2, 2026, 10:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pediatric Obesity and the Infant Microbiome (BEACH)

NCT02843087
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Not listed
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Not applicable Interventional

Effect of Daily Consumption of Glycomacropeptide on Gut Microbiome and Blood Functional Proteome of Subjects With Irritable Bowel Syndrome

NCT05482464
View directory record Official record
Conditions
Inflammatory Bowel Syndrome
Interventions
Casein glycomacropeptide (CGMP)
Dietary Supplement
Lead sponsor
Oregon State University
Other
Eligibility
18 Years to 30 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Corvallis, Oregon
Source: ClinicalTrials.gov public record
Updated Apr 3, 2025 · Synced Sep 2, 2026, 10:47 AM EDT
Withdrawn Phase 1 Interventional

Examination of Whether Host Preconditioning Modifies Short-term Transplant Survival

NCT01960764
View directory record Official record
Conditions
Atopic Dermatitis, Eczema
Interventions
Pre-Treatment with Dial liquid antibacterial soap, Control
Drug · Other
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 80 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Nov 4, 2020 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Early Avocado Exposure on Development and the Gut Microbiome in American Hispanic Infants

NCT06876935
View directory record Official record
Conditions
Gut Microbiome, Neurocognitive Correlates of Eating Habits, Infant Growth
Interventions
Daily avocado
Other
Lead sponsor
Arizona State University
Other
Eligibility
3 Months to 6 Months
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 26, 2025 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting Phase 2 Interventional

Trial Utilizing Metronidazole to Optimize the Microbiome of Rectal Adenocarcinoma Undergoing Neoadjuvant Therapy

NCT06569368
View directory record Official record
Conditions
Rectal Adenocarcinoma
Interventions
Metronidazole
Drug
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Withdrawn Phase 2 Interventional

Healthy-donor Microbiome MTP-101-C in Steroid Relapse/Refractory Immune-related Cutaneous Adverse Events (irCAEs) and Immune-mediated Colitis (IMC)

NCT06499896
View directory record Official record
Conditions
Immune-mediated Colitis (IMC), Immune-related Dermatitis
Interventions
MTP-101-C
Biological
Lead sponsor
Diwakar Davar
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2031
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting No phase listed Observational

Evaluating the Association Among Changes in Gut Microbiome, Fatigue, and Chemotherapy-Induced Nausea in Early Stage Breast Cancer

NCT05417867
View directory record Official record
Conditions
Chemotherapy-Related Nausea and/or Vomiting, Early Stage Breast Carcinoma, Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8
Interventions
Biospecimen Collection, Questionnaire Administration
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
5
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Albert Lea, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 30, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Terminated Not applicable Interventional

Blood and Stool Molecular Biomarkers Longitudinal Detection Study in Crohn's Disease (CD) Patients

NCT03566407
View directory record Official record
Conditions
Crohn's Disease
Interventions
Colonoscopy
Procedure
Lead sponsor
Prometheus Laboratories
Industry
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
5
States / cities
Los Angeles, California • Ventura, California • Hamden, Connecticut + 2 more
Source: ClinicalTrials.gov public record
Updated Jun 6, 2019 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting Not applicable Interventional

Engagement of American Indians of Southwestern Tribal Nations in Cancer Genome Sequencing

NCT06207864
View directory record Official record
Conditions
Malignant Neoplasm
Interventions
Biospecimen Collection, Return of Results, Survey Administration
Procedure · Other
Lead sponsor
New Mexico Cancer Research Alliance
Other
Eligibility
18 Years and older
Enrollment
1,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Nov 12, 2025 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effects of Cannabidiol and Tetrahydrocannabinol on Microbiome and Neuroinflammation in HIV

NCT05514899
View directory record Official record
Conditions
HIV, Cannabis, THC, Neuroinflammatory Disease, Neuroinflammatory Response, Microbiome
Interventions
THC, CBD
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
21 Years to 70 Years
Enrollment
90 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Not applicable Interventional

FODMAP Reintroduction in Irritable Bowel Syndrome

NCT03245645
View directory record Official record
Conditions
Irritable Bowel Syndrome With Diarrhea, Irritable Bowel Syndrome With Mixed Bowel Habits
Interventions
Dietary Intervention
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 10, 2023 · Synced Sep 2, 2026, 10:47 AM EDT
Withdrawn Not applicable Interventional

Microbiome Survey of Preterm Infants

NCT01942577
View directory record Official record
Conditions
Skin Microbiome
Interventions
NoSting
Device
Lead sponsor
Duke University
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 2, 2016 · Synced Sep 2, 2026, 10:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Traumatic Brain Injury and the Gut Microbiome

NCT04949607
View directory record Official record
Conditions
Brain Injury, Chronic, Brain Injuries, Traumatic
Interventions
Inulin fructooligosaccharide
Dietary Supplement
Lead sponsor
Centre for Neuro Skills
Industry
Eligibility
18 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Bakersfield, California
Source: ClinicalTrials.gov public record
Updated Jul 19, 2022 · Synced Sep 2, 2026, 10:47 AM EDT
Not yet recruiting Not applicable Interventional

Isocaloric Navy-Bean Substitution in Adults With MASLD

NCT07730853
View directory record Official record
Conditions
Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD), Liver Fibrosis, Metabolic Dysfunction-Associated Steatohepatitis (MASH)
Interventions
Dietary Supplement/Behavioral: Navy Bean-Rich Diet, Habitual Diet (Control)
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 2, 2026, 10:47 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Alternation in the Human Microbiome With Commonly Used Topical Medications

NCT03437005
View directory record Official record
Conditions
Healthy
Interventions
Desonide 0.05%, Ketoconazole 2%
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 2, 2026, 10:47 AM EDT