Characterization of Glutathione Homocystine Transhydrogenase as a Novel Isoform of Glutathione S Transferase from Aspergillus flavipes Pharmaceutical Chemistry Journal Springer Nature Link 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 Redostim, hydrogen sulfide, immune functions and viral infections A simultaneous liquid chromatography mass spectrometric assay of glutathione, cysteine, homocysteine and their disulfides in biological samples ScienceDirect Methionine Infusion Reproduces Liver Injury of Parenteral Nutrition Cholestasis Pediatric Research