AA-2G reacts with a-glucosidase which can be found on the skin to release ascorbic acid.8 Thus, AA-2G also showed reducing ability on melanin.9 In recent years, AA-2G has been widely used in cream and lotion types of cosmetic products.9,10 Understanding the stability and biofunctionality of AA-2G will assist the development of more AA-2G cosmetic applications.