The Glutathione System: A Journey from Cyanobacteria to Higher Eukaryotes 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 The antioxidant glutathione ScienceDirect Why is Glutathione the Key to Gut Health? Glutathione vs Astaxanthin BOTH are powerful antioxidants but they work differently Think of them as elite defenders against oxidative stress (cell damage). Glutathione = the MASTER antioxidant inside your body