Plasma Levels of Homocysteine and Cysteine Increased in Pediatric NAFLD and Strongly Correlated with Severity of Liver Damage Measurement of Glutathione as a Tool for Oxidative Stress Studies by High Performance Liquid Chromatography Testing and Treatments to Raise Glutathione Blood Levels in Clinical Practice Rapid and effective protocol to measure glutathione peroxidase activity Bulletin of the National Research Centre Springer Nature Link Determination of l glutathione by spot test and spectrophotometric methods based on its interaction with phenazine Analytical Methods (RSC Publishing)