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 Oxidized GSH: Vital to the GSH Cycle Auro Wellness Characterization of Glutathione Homocystine Transhydrogenase as a Novel Isoform of Glutathione S Transferase from Aspergillus flavipes Pharmaceutical Chemistry Journal Springer Nature Link Metabolic biomarkers of increased oxidative stress and impaired methylation capacity in children with autism The American Journal of Clinical Nutrition A simultaneous liquid chromatography mass spectrometric assay of glutathione, cysteine, homocysteine and their disulfides in biological samples ScienceDirect