Efficacy Evaluation Study of Vitamin C and Glutathione Liquid Sachet

Inclusion Criteria: * Healthy male or female adults, aged 18-65 years old; * Commitment not to use products having activity comparable with that of the product to be tested during the study period; * Free of any dermatological or systemic disorder that would interfere with results. Exclusion Criteria: * Subject with obvious skin surface damage; * Subject who had oral or topical medication which may affect skin condition within 1 month; * Individuals with known allergies to cosmetics, medications, or foods (especially those allergic to legumes/soy); * Pregnant or breastfeeding individuals; * Received facial laser therapy, chemical peeling in the past 2 months. * Individuals unwilling to allow publication or public disclosure of photographs taken as part of the study results