A peer reviewed study worth looking at. The relation to lack of glutathione, (an enzyme your body makes) and people suffering dying with Sars and covid19. (Glutathione is an important enzyme you need Glutathione Supplements: A Complete Guide Elevated glutathione levels may reflect an accumulation resulting from impaired recycling, often due to deficiencies in NADPH, selenium, or riboflavin (vitamin B2). This indicates a disruption in the redox balance rather than Table 181 standard reduction potentials of some reactions