The Adjunctive Role of Vitamin C on Pigment Recurrence (Randomized Clinical and Histological Trial)

This study is testing whether vitamin C supplements can help prevent the return of dark gum pigmentation after a gum-lightening procedure. Researchers want to see if adding vitamin C to standard care reduces how quickly natural gum darkening comes back. **You may be eligible if...** - You are between 18 and 40 years old (any gender) - You are generally healthy with no chronic medical conditions - You have natural dark pigmentation on your gums (upper or lower) rated moderate to severe on a standard scale - Your gum tissue is relatively thick (1.5 mm or more) **You may NOT be eligible if...** - You are pregnant or breastfeeding - You are a smoker (cigarettes, cigars, or water pipe) - You take medications known to affect gum color (such as chloroquine, minocycline, or ketoconazole) - You already take vitamin C supplements for any reason - You have a known allergy to vitamin C or its derivatives - You have been diagnosed with periodontitis (gum disease with deep pockets or bone loss) - You have poor oral hygiene or ongoing gum inflammation after initial treatment Talk to your doctor to see if this trial is right for you.