Glutathione is a natural antioxidant your body makes, and it can influence melanin production which is why its sometimes marketed for skin brightening., Oral supplements are mostly broken down in Glutathione as a depigmenting agent: an overview Villarama 2005 International Journal of Cosmetic Science Wiley Online Library The critical role of glutathione redox homeostasis towards oxidation in ermanin induced melanogenesis ScienceDirect Glutathione Kojic Acid Eye Patch Vita Jelly (60ea) Korean Masks StyleKorean.com Improved efficacy of linear glutathione peptide chaperon complexes on melanogenesis inhibition and transdermal delivery ScienceDirect