Fig. 6.

(a–h): Effects of stevioside on biomarkers of oxidative stress in the kidney of the experimental rats. (a) level of thiobarbituric reactive substances, (b) level of nitric oxide, (c) activity of superoxide dismutase, (d) activity of peroxidase, (e) level of reduced glutathione, (f) activity of glutathione peroxidase, (g) activity of glutathione-S-transferase, and (h) activity of glutathione reductase. Bars represent mean ± SEM (n = 6). Bars with different statistical markers are significantly different at p < 0.05.