The effect of ginsenoside Rg1 on anti-oxidant ability in the hippocampus of brain-aged rats (±s, n = 5).

The supernatant of hippocampus in each group was collected. The anti-oxidative ability was determined by chemical colorimetric analysis of SOD activity and MDA content, and GSH-px activity and reduced GSH level. Data are expressed as mean ± SD. Different letters represent significantly different values as assessed by ANOVA and LSD tests with P<0.05.