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 Understanding mechanisms of antioxidant action in health and disease Nature Reviews Molecular Cell Biology Why is Glutathione the Key to Gut Health? Glutathione (GSH) as an antioxidant. Hydrogen peroxide (H2O2) and Download Scientific Diagram