The study aims to evaluate the efficacy of a facial sunscreen under two experimental conditions-untinted and tinted-in improving facial spots (melasma and solar lentigines/post-inflammatory hyperpigmentation) after 8 weeks of product use under normal conditions by adult participants.
Able to understand and follow study instructions
Fitzpatrick skin types I-VI
Mild to moderate melasma, or
Visible dark spots (e.g., solar lentigines or post-inflammatory hyperpigmentation)
Known sensitivity or allergy to cosmetic or skincare products
Skin conditions or lesions in the study area that could interfere with evaluation (e.g., active dermatitis, infections, significant irritation, or extensive scarring)
Use of medications or products that may interfere with study evaluations
Recent cosmetic or dermatological procedures in the study area (e.g., chemical peels, laser treatments, invasive procedures)