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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Oral Microbiota Clear all
Withdrawn Phase 3 Interventional

Lactobacillus Lozenges as Preventative Care in Low-grade Dysplasia

NCT05707702
View directory record Official record
Conditions
Low-grade Oral Dysplasia
Interventions
Probiotic oral lozenges, Standard of care for oral dysplasia
Biological · Other
Lead sponsor
Boston Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Study to Evaluate the Effect of a Stannous Fluoride Toothpaste on the Oral Microbiome

NCT06048809
View directory record Official record
Conditions
Oral Health
Interventions
Stannous Fluoride Toothpaste (Sensodyne Repair and Protect), Regular Fluoride Toothpaste (Colgate Cavity Protection)
Other
Lead sponsor
HALEON
Industry
Eligibility
18 Years to 65 Years
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 9, 2025 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 4 Interventional

A Peri-intubation Oral Intervention to Reduce Oral Flora and VAP

NCT00248300
View directory record Official record
Conditions
Pneumonia
Interventions
Chlorhexidine
Other
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
156 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Nov 10, 2015 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 1 Interventional

Evaluating the Safety and Efficacy of Oral Encapsulated Fecal Microbiota Transplant in Peanut Allergic Patients

NCT02960074
View directory record Official record
Conditions
Peanut Allergy
Interventions
Fecal Microbiota Capsule
Biological
Lead sponsor
Rima Rachid
Other
Eligibility
18 Years to 40 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 29, 2026 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Antibacterial Mouthwash on Muscle Function in Healthy Young Men and Women

NCT04095442
View directory record Official record
Conditions
Quadriceps Muscle
Interventions
Cepacol, Tom's Natural Mouthwash
Device
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 30 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Mar 17, 2024 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional

Oral Administration of Colostrum to Premature Babies: Impact on the Oral Microbiota

NCT02306980
View directory record Official record
Conditions
Changes in the Oral Microbiota
Interventions
Colostrum
Other
Lead sponsor
University of California, Davis
Other
Eligibility
12 Hours to 7 Days
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jul 24, 2017 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 2 Interventional Results available

Open-Label Extension of CP101 Trials Evaluating Oral Full-Spectrum Microbiota™ (CP101) in Subjects With Recurrence of Clostridium Difficile Infection

NCT03497806
View directory record Official record
Conditions
Clostridium Difficile Infection, Recurrent Clostridium Difficile Infection, C. Diff, CDI, Recurrent C. Diff, rCDI, C. Difficile, Recurrent CDI, FMT, Fecal Microbiota, Fecal Transplant
Interventions
CP101
Biological
Lead sponsor
Finch Research and Development LLC.
Industry
Eligibility
18 Years and older
Enrollment
132 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
53
States / cities
Scottsdale, Arizona • Los Angeles, California • Murrieta, California + 47 more
Source: ClinicalTrials.gov public record
Updated Aug 29, 2022 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Role of Oral and Intestinal Microbiota in Rheumatoid Arthritis (RA)

NCT01198509
View directory record Official record
Conditions
Rheumatoid Arthritis, Psoriatic Arthritis, Periodontal Disease
Interventions
doxycycline, vancomycin
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 70 Years
Enrollment
178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 12, 2015 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study of Virtually Supervised Mouthwash and Interdental Brushes

NCT05756673
View directory record Official record
Conditions
Healthy
Interventions
Colgate Cavity Protection Toothpaste, LISTERINE ZERO Alcohol Mouthwash COOL MINT, LISTERINE COOL MINT Antiseptic Mouthwash, TePe Original Interdental Brush
Drug · Device
Lead sponsor
Johnson & Johnson Consumer Inc. (J&JCI)
Industry
Eligibility
18 Years and older
Enrollment
292 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 16, 2023 · Synced Jun 27, 2026, 3:56 AM EDT
Completed No phase listed Observational

Long-Term Stability of Oral Microbiome Samples

NCT03068546
View directory record Official record
Conditions
Oral Microbiota, Long Term Sample Stability
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years to 100 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 15, 2020 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Probiotic for Oral Health (PRO Health) Study

NCT03748017
View directory record Official record
Conditions
Oral Microbiome
Interventions
Placebo-Control Supplement, Streptococcus-Containing Probiotic Supplement
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
21 Years to 45 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Jun 27, 2026, 3:56 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Longitudinal Oral Microbiome Sampling for BE

NCT05133102
View directory record Official record
Conditions
Barrett Esophagus
Interventions
Sample collection
Other
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
275 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
2
States / cities
Ann Arbor, Michigan • New York, New York
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Jun 27, 2026, 3:56 AM EDT
Recruiting Phase 1Phase 2 Interventional

Safety Evaluation of Fecal Microbiota Transplantation in Severe Alcoholic Hepatitis

NCT05006430
View directory record Official record
Conditions
Alcoholic Hepatitis
Interventions
Fecal Microbiota Transplantation, Placebo
Biological · Other
Lead sponsor
Prasun Kumar Jalal
Other
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2025 · Synced Jun 27, 2026, 3:56 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Oral Microbiome and Upper Aerodigestive Squamous Cell Cancer

NCT03304132
View directory record Official record
Conditions
Oral Cancer
Interventions
Classification of Oral Microbiome Using 16S rRNA gene sequence-based approach, Classification of Oral Microbiome Using taxonomic approach
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
40 Years to 92 Years
Enrollment
560 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2010
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 8, 2017 · Synced Jun 27, 2026, 3:56 AM EDT
Not yet recruiting Phase 2 Interventional

OEA for Young Adults With Alcohol Use Disorder

NCT07503782
View directory record Official record
Conditions
Alcohol Use Disorder (AUD)
Interventions
oleoylethanolamide
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
18 Years to 25 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 2 Interventional Results available

The Effect of Chlorhexidine on the Oral and Lung Microbiota in Chronic Obstructive Pulmonary Disease

NCT02252588
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Chlorhexidine, Placebo
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
40 Years to 85 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Dec 28, 2020 · Synced Jun 27, 2026, 3:56 AM EDT
Terminated Phase 1 Interventional

RBX7455 Before Surgery for the Treatment of Operable Breast Cancer

NCT04139993
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage IA Breast Cancer AJCC v8, Anatomic Stage IB Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage IIA Breast Cancer AJCC v8, Anatomic Stage IIB Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Anatomic Stage IIIA Breast Cancer AJCC v8, Anatomic Stage IIIB Breast Cancer AJCC v8, Anatomic Stage IIIC Breast Cancer AJCC v8, Breast Adenocarcinoma, Invasive Breast Carcinoma, Prognostic Stage I Breast Cancer AJCC v8, Prognostic Stage IA Breast Cancer AJCC v8, Prognostic Stage IB Breast Cancer AJCC v8, Prognostic Stage II Breast Cancer AJCC v8, Prognostic Stage IIA Breast Cancer AJCC v8, Prognostic Stage IIB Breast Cancer AJCC v8, Prognostic Stage III Breast Cancer AJCC v8, Prognostic Stage IIIA Breast Cancer AJCC v8, Prognostic Stage IIIB Breast Cancer AJCC v8, Prognostic Stage IIIC Breast Cancer AJCC v8, Triple-Negative Breast Carcinoma
Interventions
Microbiota-based Formulation RBX7455
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older · Female only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Oct 3, 2023 · Synced Jun 27, 2026, 3:56 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Mouthrinse on the Microbiome of the Oral Cavity and GI Tract

NCT05603650
View directory record Official record
Conditions
Oral Bacterial Infection, Oral Infection, Microbial Colonization, Viral Infection
Interventions
Lumineux Oral Essentials rinse, Listerine rinse
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Phase 2 Interventional Results available

Efficacy, Safety, and Tolerability Study of Oral Full-Spectrum MicrobiotaTM (CP101) in Subjects With Recurrent C. Diff

NCT03110133
View directory record Official record
Conditions
Clostridium Difficile Infection Recurrence
Interventions
Full Spectrum Microbiota, Placebo
Drug
Lead sponsor
Finch Research and Development LLC.
Industry
Eligibility
18 Years and older
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
54
States / cities
Scottsdale, Arizona • Los Angeles, California • Murrieta, California + 48 more
Source: ClinicalTrials.gov public record
Updated Oct 4, 2022 · Synced Jun 27, 2026, 3:56 AM EDT
Recruiting Early Phase 1 Interventional

Evaluation of an Oral Microbiota-based Therapeutic as a Treatment Option for PSC

NCT06197308
View directory record Official record
Conditions
Primary Sclerosing Cholangitis
Interventions
oral vancomycin and oral amoxicillin
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 76 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated May 19, 2026 · Synced Jun 27, 2026, 3:56 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Assess the Effect of Treating Periodontal Disease on Cardiovascular Function in Young Adults

NCT01376791
View directory record Official record
Conditions
Periodontal Disease, Atherosclerosis
Interventions
Not listed
Lead sponsor
San Diego State University
Other
Eligibility
21 Years to 40 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Valley Center, California
Source: ClinicalTrials.gov public record
Updated Apr 22, 2013 · Synced Jun 27, 2026, 3:56 AM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Investigation of the Interplay Between Local Oral Inflammation, Microbiota and Systemic Immune Responses.

NCT06966492
View directory record Official record
Conditions
Gingival Inflammation
Interventions
Stannous Fluoride Toothpaste (SnF)
Drug
Lead sponsor
Colgate Palmolive
Industry
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Jun 27, 2026, 3:56 AM EDT
Completed No phase listed Observational

A Description of Bacteria in the Mouths of Patients With Severe Aplastic Anemia

NCT01900119
View directory record Official record
Conditions
Severe Aplastic Anemia (SAA)
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 99 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced Jun 27, 2026, 3:56 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Taste Perception, Salivary Proteins & the Oral Microbiome

NCT04107688
View directory record Official record
Conditions
Saliva Altered, Taste, Altered
Interventions
Control, CPE
Other
Lead sponsor
Rutgers University
Other
Eligibility
18 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 13, 2024 · Synced Jun 27, 2026, 3:56 AM EDT