Endogenous Deficiency of Glutathione as the Most Likely Cause of Serious Manifestations and Death in COVID 19 Patients ACS Infectious Diseases Long COVID and Oxidative Stress: Brain Fog, Fatigue, and Cellular Damage Explained covidCAREgroup If fatigue, brain fog, or crashes make everything feel harder, strengthening the basics can make a real difference. Supporting mitochondrial function is a core piece of many Long COVID and ME CFS treatment Long COVID is not just viral. It's oxidative and inflammatory. Research suggests that low glutathione levels and excess oxidative stress play a major role in long COVID symptoms like fatigue, brain