Efficacy and Tolerability of Test Product Versus Cysteamine 5% in Treatment of Facial Epidermal Melasma

Inclusion Criteria: * Facial epidermal melasma (exclude mixed and dermal melasma) * Subjects free of excessive hair, acne, cuts, abrasions, fissures, wounds, lacerations, or any other active skin conditions on the face Exclusion Criteria: * Subjects with any other signs of significant irritation or skin disease * Subjects using oral contraceptive pills or hormonal implants as birth control measures during the study * Subjects who had a skin lightening procedure in the past 8 weeks