What is glutathione and why must we protect patient access to it? Glutathione: The Master Antioxidant Core Med Science Glutathione is a natural antioxidant your body makes, and it can influence melanin production which is why it's sometimes marketed for skin brightening. Oral supplements are mostly broken down in the How Much is Too Much? Mastering Your Glutathione Injection Dosage Per Week Glutathione: a powerful antioxidant for a healthy skin