Homocysteine Supreme Superior Supplement Products Science First Designs for Health Oxidized GSH: Vital to the GSH Cycle Auro Wellness Metabolic biomarkers of increased oxidative stress and impaired methylation capacity in children with autism The American Journal of Clinical Nutrition 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 A highly sensitive fluorescent probe for selective detection of cysteine homocysteine from glutathione and its application in living cells and tissues New Journal of Chemistry (RSC Publishing)