Vitamin c: a new way to brighten your smile?
NCT ID NCT07513727
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether vitamin C can lighten dark gums caused by excess melanin. Thirty adults with dark gums will receive vitamin C as a gel, through tiny needles (microneedling), or as injections (mesotherapy). Researchers will measure color changes and look at gum tissue under a microscope to see if the treatment works.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- Vitamin C (L-Ascorbic Acid)
- What this could lead to
- If it works, this could offer a simple, non-surgical way to lighten dark gums using vitamin C, improving smile aesthetics.
- What could go wrong
- This is a small, early-stage trial with only 30 people. Results may not apply to everyone, and the effect might be modest or temporary.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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 30 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jul 2025
- Expected to finish
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May 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
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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20 to 40 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
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Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: \- 1- Both genders aged from 20-35 years. 2- Patients clinically diagnosed with physiologic gingival melanin pigmentation in the maxillary and mandibular keratinized gingiva. 3- Patients complaining of compromised esthetics. 4- Patients should be systemically free any disease as verified by a medical history diagnostic sheet or via health questionnaire Exclusion Criteria: \- 1- Patient clinically diagnosed with periodontitis and / or manifest poor oral hygiene with high plaque and gingival indices 2- Pregnant or lactating females. 3- Patients with clinical diagnosed lesion in the area of interest primarily the gingivae encompassing the maxillary /mandibular anterior teeth e.g. pigmented lesion of intestinal polyposis syndrome, McCune-Albright syndrome and fibro-osseous lesions as florid osseous dysplasia. 4- Patient with previous treatment of gingival hyperpigmentation. 5- Patients with history of being allergic to the vitamin C. 6- Patients with any systemic disease ( e.g. Addison disease ) or drugs consumed that may cause clinical gingival hyperpigmentation 7- Patients who are active or previous smokers.
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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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Al-Azhar University Faculty of Dentistry ( Girls )
RECRUITINGCairo, Cario Governorate, 11651, Egypt
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