Figure 3. Effect of GNL on antioxidant activity in D-gal-induced mice serum and hippocampus. (A) serum, MDA level control, and treated animals (nmol/mg protein), (B) SOD (U/mg protein), (C) CAT (U/mg protein), and (D) GPx (U/mg protein). (E) Hippocampus MDA level control and treated animals (nmol/mg protein), (F) SOD (U/mg protein), (G) CAT (U/mg protein), and (H) GPx (U/mg protein). Values are expressed as the mean ± SD (n = 6). *P < 0.05 vs. control group, #P < 0.05 vs. D-gal alone-treated mice. @P < 0.05 young vs. old mice.