Study on the Functional Impact of Cosmetics on Improving Self-Esteem and Quality of Life in Black Women

Inclusion Criteria: * Female participants aged 18 to 55 years * Clinical diagnosis of facial post-inflammatory hyperpigmentation (PIH) * Self-identified as Black (including "preta" or "parda") * Fitzpatrick skin types IV to VI * Employees, students, or affiliated personnel of Hospital Israelita Albert Einstein (including contractors and fellows), recruited from institution units * Willing and able to comply with all study procedures and attend all scheduled visits * Able and willing to provide written informed consent and authorization for image use Exclusion Criteria: * Pregnant or breastfeeding women, or those planning pregnancy during the study period * Type 1 diabetes mellitus or related complications (e.g., nephropathy, dermatological conditions associated with diabetes, history of hypoglycemia, diabetic ketoacidosis, or hyperosmolar coma) * Known or suspected intolerance to similar cosmetic products * History of atopy or allergic reactions to cosmetic products * Personal or family history of skin cancer * Active skin conditions or lesions affecting the face * Facial marks or scars that may interfere with assessments * Skin irritation due to recent sun exposure * Excessive sun or UV exposure, including artificial tanning, within the past month * Use of facial cosmetic products within 7 days before screening * Use of topical or systemic treatments within 1 month before screening * Use of depigmentation treatments within 3 months before screening * Use of dermocosmetic treatments for PIH within 3 months before screening * Facial dermatological or aesthetic procedures within 2 weeks before screening * Use of corticosteroids, anticoagulants, or immunosuppressive drugs * Score ≥5 indicating anxiety or depression on Patient Health Questionnaire (PHQ-9) or Generalized Anxiety Disorder scale (GAD-7) * Any other condition that, in the investigator's judgment, may compromise study participation or results (to be documented in the medical record)