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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Oral Microbiome Clear all
Completed No phase listed Observational Accepts healthy volunteers

Oral Microbiome and Pancreatic Cancer

NCT03302637
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
16S rRNA gene sequencing assay
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
55 Years to 74 Years
Enrollment
732 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 5, 2017 · Synced Jun 26, 2026, 11:29 PM EDT
Completed Not applicable Interventional

Oral Probiotic Administration to Modulate the Airway Microbiome in Obese Asthmatic Subjects

NCT03157518
View directory record Official record
Conditions
Asthma
Interventions
Seeking Health Probiota Bifido
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 99 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 19, 2018 · Synced Jun 26, 2026, 11:29 PM EDT
Withdrawn Phase 3 Interventional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 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Influence of Oral Probiotics on the Microbiome and Lipidome

NCT03605108
View directory record Official record
Conditions
Gut Microbiome, Skin Microbiome, Gut Lipidome, Skin Lipidome, Blood Lipidome
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jun 11, 2019 · Synced Jun 26, 2026, 11:29 PM EDT
Completed No phase listed Observational

Oral Aromatase Inhibitors Modify the Gut Microbiome

NCT05030038
View directory record Official record
Conditions
Breast Cancer
Interventions
Fecal swab collection, Blood samples
Biological
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Evaluation of a Daily Oral Care Lozenge on Oral Health and Quality of Life in Older Adults

NCT03693027
View directory record Official record
Conditions
Oral Health
Interventions
PTx800 lozenges, Placebo control
Dietary Supplement
Lead sponsor
Primal Therapies Inc.
Industry
Eligibility
60 Years to 85 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 8, 2018 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Probiotics on the Microbiome and Lipidome in Acne Vulgaris

NCT04596748
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
13 Years to 45 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 23, 2020 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Completed No phase listed Observational

Isolation and Characterization of Multiple Microbial Species From Diverse Healthy Adults

NCT05150184
View directory record Official record
Conditions
Human Microbiome
Interventions
Non-interventional
Other
Lead sponsor
Danisco
Industry
Eligibility
18 Years to 50 Years
Enrollment
52 participants
Timeline
2021 – 2023
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Triphala and Rubia Cordifolia on Gut Microbiome and Skin

NCT03477825
View directory record Official record
Conditions
Sebum Production, Stool Microbiome, Transepidermal Water Loss, Facial Brrightness, Erythema, Wrinkles, Facial Shine
Interventions
Placebo Oral Tablet, Rubia Cordifolia, Triphala
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 14, 2019 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Completed No phase listed Observational

Longitudinal Changes in the Oral and Gut Microbiome of Individuals With Alcohol Dependence

NCT02911077
View directory record Official record
Conditions
Alcoholic Intoxication, Alcohol-Related Disorders
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 99 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Jun 26, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Oral Probiotics and Herbal Supplementation on the Gut Microbiome and Sebum Excretion Rate in Non-Cystic Acne

NCT05919810
View directory record Official record
Conditions
Acne Vulgaris, Acneiform Eruptions, Skin Diseases, Sebaceous Gland Diseases
Interventions
Probiotic, Oral herbal powder supplement
Other · Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
12 Years to 45 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ButyraGen™, Short Chain Fatty Acids and Gut Microbiome

NCT05601635
View directory record Official record
Conditions
Healthy
Interventions
ButyraGen™
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Jun 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM 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 26, 2026, 11:29 PM 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 16, 2021 · Synced Jun 26, 2026, 11:29 PM EDT