A Clinical Study to Evaluate the Efficacy in Improving Dark Spots After 8 Weeks of Use of Facial Sunscreens in Adult Participants

A Monocentric and Open-Label Clinical Study to Evaluate the Efficacy in Improving Dark Spots After 8 Weeks of Use of Facial Sunscreens in Adult Research Participants

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.

Inclusion Criteria:

1. Able to understand and follow study instructions

2. Fitzpatrick skin types I-VI

3. Presence of facial hyperpigmentation, such as:

   • Mild to moderate melasma, or
   • Visible dark spots (e.g., solar lentigines or post-inflammatory hyperpigmentation)

4. Willing to comply with study procedures and product use

5. For subjects in applicable groups: willing to use assigned sunscreen product

Exclusion Criteria:

1. Known sensitivity or allergy to cosmetic or skincare products
2. Skin conditions or lesions in the study area that could interfere with evaluation (e.g., active dermatitis, infections, significant irritation, or extensive scarring)
3. Use of medications or products that may interfere with study evaluations
4. Recent cosmetic or dermatological procedures in the study area (e.g., chemical peels, laser treatments, invasive procedures)
5. Excessive sun exposure or use of tanning beds immediately prior to or during the study
6. Pregnancy or intention to become pregnant during the study
7. Participation in another clinical study within a recent period
8. Any condition or situation that, in the investigator's judgment, may interfere with study participation or evaluation of results