Bad breath breakthrough? probiotic lozenges put to the test
NCT ID NCT07384130
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests if a daily probiotic lozenge can reduce bad breath caused by a sulfur compound (cysteine) in healthy adults. Forty volunteers will take either the active lozenge or a placebo for 13 days. Breath sulfur levels are measured before and after treatment to see if the probiotics help.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 40 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Mar 2026
An estimate. Start dates often move.
- Expected to finish
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Jul 2026
An estimate. End dates often move.
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 70 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Participants should be otherwise healthy, * practice good oral hygiene, * 18 - 70 years of age Exclusion Criteria: * on antibiotic therapy, * immunocompromised (have a weakened immune system) * history of autoimmune disease, * allergy or sensitivity to dairy, * have an active periodontal disease, any known allergy or sensitivity to components of the test product or cysteine solution.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Blis Technologies Ltd
Dunedin, Otago, 9012, New Zealand
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Other studies related to the condition(s) this trial covers.
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