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Showing 1–24 of 68 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dysbiosis Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility of an Oral Intervention for Sexual Health in Transgender Men

NCT06470906
View directory record Official record
Conditions
Vaginal Dysbiosis, Vaginal Disease, Molecular-bacterial Vaginosis
Interventions
Probiotic Group, Placebo Group
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated May 8, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

How Reflux Medications Affect the Microbiome of Infants

NCT03747991
View directory record Official record
Conditions
GERD, Dysbiosis
Interventions
Not listed
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
2 Months to 12 Months
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 11, 2024 · Synced Sep 21, 2026, 4:23 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Alcohol Misuse, Gut Microbial Dysbiosis and PrEP Care Continuum: Application and Efficacy of SBIRT Intervention

NCT06005298
View directory record Official record
Conditions
Alcohol Use Disorder, Risk Behavior, Health, Dysbiosis, HIV Infections
Interventions
Screening, Brief Intervention, Referral to Treatment (SBIRT)
Behavioral
Lead sponsor
Shirish S Barve
Other
Eligibility
18 Years to 85 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Jul 21, 2024 · Synced Sep 21, 2026, 4:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Angiotensin Converting Enzyme (ACE2), Brain, Gut Dysbiosis in Pulmonary Hypertension

NCT04104490
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Not listed
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Oct 26, 2022 · Synced Sep 21, 2026, 4:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Alteration of Stool Microbiota in Preterm Infants With Anemia

NCT03554278
View directory record Official record
Conditions
Anemia, Neonatal, Necrotizing Enterocolitis, Dysbiosis
Interventions
Not listed
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
7 Days to 30 Days
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Feb 4, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Active, not recruiting Not applicable Interventional Results available

Assessing Gut Microbiota Mediated Health Outcomes of Whole Wheat and Its Major Bioactive Components

NCT05318183
View directory record Official record
Conditions
PreDiabetes, Dysbiosis, Endotoxemia, Inflammation
Interventions
Whole Wheat Bread, White Bread (control)
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 19, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Safety and Efficacy of FMT in Individuals With One or More Recurrences of Clostridium Difficile Associated Disease (CDAD)

NCT03548051
View directory record Official record
Conditions
Clostridial Infection, Dysbiosis, Probiotic Therapy
Interventions
Fecal Microbiota Transplantation (FMT), Saline
Procedure · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
3
States / cities
Decatur, Georgia • Durham, North Carolina • Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 1, 2022 · Synced Sep 21, 2026, 4:23 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Prebiotic Effects of California Grapes on Gut Health and Cardiometabolic Health in Overweight Men and Women

NCT06544954
View directory record Official record
Conditions
Arterial Stiffness, Blood Pressure, Dysbiosis, Inflammation, Permeability; Increased
Interventions
Freeze-dried grape powder, Placebo powder
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
45 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Apr 12, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Iron Supplementation and Intestinal Health

NCT04497012
View directory record Official record
Conditions
Anemia of Prematurity, Very Low Birth Weight Infant
Interventions
2mg/kg/day Iron Sulfate, 6 mg/kg/day Iron Sulfate
Drug
Lead sponsor
University of South Florida
Other
Eligibility
1 Day to 6 Months
Enrollment
183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Natural History of Intestinal Inflammation in People With Primary Immune Dysregulations

NCT03278912
View directory record Official record
Conditions
Chronic Granulomatous Disease, Inflammatory Bowel Disease
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
3 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 12, 2023 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional Results available

Proton Pump Inhibitors and Dysbiosis in Cirrhosis

NCT01458990
View directory record Official record
Conditions
Cirrhosis, Healthy
Interventions
Omeprazole
Drug
Lead sponsor
Hunter Holmes Mcguire Veteran Affairs Medical Center
Federal
Eligibility
18 Years to 70 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 18, 2018 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Gut-level Antiinflammatory Activities of Green Tea in Metabolic Syndrome

NCT03973996
View directory record Official record
Conditions
Dysbiosis, Endotoxemia, Metabolic Syndrome, Inflammation
Interventions
Green Tea Extract, Placebo
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Active, not recruiting Not applicable Interventional

A Study of Healthy Microbiome, Healthy Mind

NCT06020703
View directory record Official record
Conditions
Critical Illness, COVID-19, PICS, Cognitive Impairment, Mental Health Impairment, Weakness, Muscle, Dysbiosis
Interventions
Fermented Food Diet
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of Peanut Butter on Gut and Metabolic Health

NCT06916936
View directory record Official record
Conditions
Dysbiosis
Interventions
Creamy Richards 100% Peanuts! Creamy Natural Peanut Butter, Cadbury Milk Chocolate Spread
Other
Lead sponsor
Florida State University
Other
Eligibility
6 Years to 13 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Recruiting Early Phase 1 Interventional

Cranberry and Gut Health in Crohn's Disease

NCT07170462
View directory record Official record
Conditions
Crohn Disease (CD), Crohn Disease
Interventions
Cranberry powder, Placebo
Drug · Dietary Supplement
Lead sponsor
Ana Maldonado-Contreras
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional

Prebiotics in Peritoneal Dialysis

NCT03265639
View directory record Official record
Conditions
End Stage Renal Disease, Gut Microbiome Dysbiosis
Interventions
P-inulin
Dietary Supplement
Lead sponsor
Ali Ramezani
Other
Eligibility
21 Years and older
Enrollment
9 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
2
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Nov 18, 2018 · Synced Sep 21, 2026, 4:23 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Personalized GI Motility Responses to Diet

NCT06386471
View directory record Official record
Conditions
Nutritional and Metabolic Diseases, Gastrointestinal Dysfunction, Cardiovascular Diseases, Dysbiosis
Interventions
Whole grain rye bread, Refined grain rye bread
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
21 Years to 63 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Prebiotic Effects of a Polyphenol-rich Food Product

NCT03659240
View directory record Official record
Conditions
Dysbiosis
Interventions
Cranberry beverage, Placebo beverage
Other
Lead sponsor
Iowa State University
Other
Eligibility
18 Years to 45 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Sep 21, 2026, 4:23 AM EDT
Enrolling by invitation Not applicable Interventional

Postbiotics for Mitigation of Postoperative Dysbiosis in Gastrointestinal Cancer Surgery

NCT07050485
View directory record Official record
Conditions
Colon Cancer, Gastrointestinal Cancer
Interventions
PoZibio, Inert placebo
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
2
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Dec 28, 2025 · Synced Sep 21, 2026, 4:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Microbiome and the Gut-Brain Axis

NCT02693327
View directory record Official record
Conditions
Mental Disorder
Interventions
Biological Sample, Blood Sample
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 80 Years
Enrollment
58 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 14, 2018 · Synced Sep 21, 2026, 4:23 AM EDT
Recruiting Phase 2 Interventional

Effect of FB301 on Vaginal Bacterial Profile in Women With Asymptomatic Vaginal Dysbiosis Undergoing a Mock Frozen Embryo Transfer Cycle

NCT07453069
View directory record Official record
Conditions
Vaginal Dysbiosis
Interventions
FB-301, Placebo, Chlorhexidine (0.5%) Vaginal Cleanse, Sham vaginal cleanse (saline)
Drug · Other
Lead sponsor
Freya Biosciences ApS
Industry
Eligibility
18 Years to 40 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
4
States / cities
Wichita, Kansas • Waltham, Massachusetts • Charlotte, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Commercially Available Synbiotic on the Gut Microbiome and Cardiometabolic Health

NCT07515443
View directory record Official record
Conditions
Hypertension, Gut Dysbiosis, Overweight , Obesity
Interventions
Synbiotic, Placebo
Dietary Supplement
Lead sponsor
Southern Utah University
Other
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Cedar, Utah
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional

The Use of A Prebiotic to Promote a Healthy Gut Microbiome in Pediatric Stem Cell Transplant Recipients

NCT04111471
View directory record Official record
Conditions
Microbial Colonization
Interventions
Prebiotics, Placebos
Dietary Supplement
Lead sponsor
Ann & Robert H Lurie Children's Hospital of Chicago
Other
Eligibility
2 Years to 18 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 20, 2024 · Synced Sep 21, 2026, 4:23 AM EDT
Completed Not applicable Interventional Results available

Multisensory Early Oral Administration of Human Milk in Preterm Infants

NCT06230848
View directory record Official record
Conditions
Infant Development, Stress
Interventions
Multisensory Early Oral Administration of Human Milk (M-MILK)
Other
Lead sponsor
Loyola University
Other
Eligibility
0 Years to 1 Year
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Sep 21, 2026, 4:23 AM EDT