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, often dubbed the master antioxidant plays a crucial role in detoxification, immune function, and protecting our cells from oxidative stress. Here are some signs that your levels might be low: Persistent Glutathione: Antioxidant Properties Dedicated to Nanotechnologies Understanding mechanisms of antioxidant action in health and disease Nature Reviews Molecular Cell Biology