Glutathione Reductase (GR) Activity Assay Kit Rapid and effective protocol to measure glutathione peroxidase activity Bulletin of the National Research Centre Springer Nature Link Whats the best blood test for riboflavin? , Unfortunately, the gold standard is the erythrocyte glutathione reductase activity coefficient EGRAC, but no one offers this. Some labs offer How to assess Vitamin B2 Status? B2 nutritional status is assessed through the ERYTHROCYTE GLUTATHIONE REDUCTASE ACTIVITY COEFFICIENT (EGRAC), which should be < 1.2. What is this coefficient? FAD Pedro Carrera Bastos Catalase, Glutathione Peroxidase, and Peroxiredoxin 2 in Erythrocyte Cytosol and Membrane in Hereditary Spherocytosis, Sickle Cell Disease, and Thalassemia