Amazon.com: Doctor's Best Best Vitamin C 500mg, 120 Count : Health & Household Components of the Glutathione Cycle as Markers of Biological Age: An Approach to Clinical Application in Aging Direct Derivatization in Dried Blood Spots for Oxidized and Reduced Glutathione Quantification in Newborns Anaemia is common in people with #CKD, especially in later stages of the disease. Kidney disease reduces production of the hormone erythropoietin (EPO), needed for making red blood cells. People with anemia