Reduced glutathion (GSH), glutathion-reductase (GR) and glutathion-peroxidase (GSH-Px) are significant indicators of oxidative stress. Oxidative stress is a consequence of increased production of reactive oxygen radicals and/or on the other hand, insufficient antioxidative protection. It is well-known that free radicals have key role in the large number of biological phenomena, such as differentiation, transformation, signal transduction, aging etc., and they are important factors in pathogenesis of various diseases (carcinoma, diabetes, Alzheimer, Parkinson, aterosclerosis). This paper presents results of investigation of content of GSH and activities of GR and GSH-Px in healthy patients and diabetes insulindependent patients between 20 and 75 years of age in the region of Indjija. Correlation between investigated parameters in healthy persons and diabetics was found, as well as with results of similar investigations in other countries. Investigated sample comprised 200 healthy patients (20-75 years) divided into 5 groups, and 80 diabetes patients divided into 4 groups. Every group consisted of equal number of males and females. Above mentioned parameters were determined in hemolysate. Parameters change depending on patient age, and changes are more intense in all patients. Some differences exist in correlation of our results with results obtained in other regions.