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 How To Use Glutathione For Skin Whitening: A Complete Guide Miduty How To Get the Most Out of Your Glutathione Supplement Life Extension Setria Glutathione: What It Is, How It Works, and Why Your Body Might Simply Good Supplements Glutathione as a skinlightening agent and in melasma: a systematic review Sarkar 2025 International Journal of Dermatology Wiley Online Library Glutathione Tablets vs Injection Which Works Better?