Figure 5.

Effect of geraniol on neuroinflammatory response in studied groups: (a) TNF-α levels of young rats, (b) TNF-α levels of aged rats, (c) IL-6 levels of young rats, (d) IL-6 levels of aged rats, (e) iNOS levels of young rats, and (f) iNOS levels of aged rats. Values are expressed as the mean ± SEM (n = 8). The means of the same measured parameter with different letters in each bar (A–D) are significantly different (p < 0.01), where the largest data value takes the letter (A) and the smallest data value takes the letter (D).