Effect of Toothpastes on Oral Malodor

January 8, 2026 updated by: Basak Karasu, Çankırı Karatekin University

Investigation of the Effect of Toothpastes With Different Ingredients on Oral Malodor in Young Adults

This study aimed to evaluate the effects of different toothpaste formulations on oral malodor in young adults, addressing the lack of clinical evidence regarding propolis- and probiotic-containing toothpastes, which have predominantly been investigated in mouthrinse, tablet, or chewing gum formulations.

Volunteers aged 18-30 years with baseline organoleptic assessment (OA) and Breath Checker® (BC) scores >0 were randomized into four toothpaste groups: propolis-containing (Glimo Beta), probiotic-containing (Glimo Pi), phosphate-based (Glimo Gamma), and a standard fluoride toothpaste (Sensodyne). Allocation concealment was ensured using identical coded containers, and outcome assessors were blinded. After exclusions, 52 participants completed the study. Oral malodor was evaluated at baseline (T0) and Day 14 (T1) using OA, BC measurements, and self-perceived oral malodor scores.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
52

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Turkey (Türkiye)
    • Merkez
      • Çankırı, Merkez, Turkey (Türkiye)
        • Cankiri Karatekin University

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • • No systemic diseases or medications known to cause halitosis

    • No active periodontal disease requiring treatment
    • No antibiotic use within the previous month
    • No orthodontic or removable space-maintaining appliances
    • Non-smokers
    • Organoleptic score >0 and Breath-Checker® (BC) score >0 at baseline

Exclusion Criteria:

  • Participants reporting systemic conditions, active periodontal therapy, smoking, or antibiotic usage were excluded.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Propolis containing toothpaste
Participants in this arm used propolis containing toothpaste twice daily for routine oral hygiene during the study period.
Other: Propolis Containing Toothpaste
Participants were instructed to brush their teeth using propolis toothpaste twice daily (morning and evening) for 14 days as part of their routine oral hygiene.
Experimental: probiotic containing toothpaste
Participants in this arm used probiotic containing toothpaste twice daily for routine oral hygiene during the study period.
Other: Probiotic containing toothpaste
Participants were instructed to brush their teeth using probiotic toothpaste twice daily (morning and evening) for 14 days as part of their routine oral hygiene.
Experimental: Phosphate-based formulation toothpaste
Participants in this arm used phosphate-based formulation toothpaste twice daily for routine oral hygiene during the study period.
Other: Phosphate-based formulation toothpaste
Participants were instructed to brush their teeth using Phosphate-based formulation toothpaste twice daily (morning and evening) for 14 days as part of their routine oral hygiene.
Experimental: Standard fluoride
Participants in this arm used standard fluoride containing toothpaste twice daily for routine oral hygiene during the study period.
Other: Standard fluoride toothpaste
Participants were instructed to brush their teeth using standard fluoride toothpaste twice daily (morning and evening) for 14 days as part of their routine oral hygiene.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change in oral malodor severity
Time Frame: Baseline and Day 14
Oral malodor was assessed using an organoleptic scoring method and a portable breath checker device. The change in scores from baseline to the end of the intervention period was evaluated.
Baseline and Day 14

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Çankırı Karatekin University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 30, 2025

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
June 30, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 25, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 29, 2025

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 8, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 9, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 9, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 8, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Approval No: 18, Date: 29/01/2

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data will not be shared publicly due to privacy and ethical considerations.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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Conditions

Rare Diseases

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Dietary Supplements

Sponsor/Collaborators

Locations

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