['Coronary artery disease is the significant cause of morbidity and mortality today. The treatment of coronary artery disease is improving, but its prevalence is increasing. Both primary and secondary prevention measures are of vital importance.', 'In this study, vitamin C, total antioxidant status, malondialdehyde in serum and erythrocyte-reduced glutathione levels were investigated in patients with atherosclerosis and compared with those of controls. Levels of serum MDA, vitamin C, total antioxidant status, and erythrocyte-reduced glutathione were determined according to the methods of Yagi, Bauer et al., Miller et al., and Beutler, respectively.', 'Erythrocyte-reduced glutathione, serum vitamin C, total antioxidant status, and malondialdehyde values of both patients with atherosclerosis and controls were as follows: 2.80 +/- 0.76, 5.82 +/- 0.67 micromol GSH/g Hb; 1.00 +/- 0.19, 1.62 +/- 0.30 mg/dL; 0.86 +/- 0.14, 1.43 +/- 0.16 mmol/L, and 4.26 +/- 0.9, 1.02 +/- 0.80 nmol/mL, respectively. There was a decrease in the levels of serum vitamin C, erythrocyte-reduced glutathione, and total antioxidant status (p <0.001), and increase in the levels of serum malondialdehyde (p <0.001) in patients with atherosclerosis when compared with those of controls.'] Are decreased serum total antioxidant status and erythrocyte-reduced glutathione levels associated with increased serum malondialdehyde in atherosclerotic patients?