Table 2. Biochemical parameters in the serum samples of the control and the aging groups (n=6, mean ± S.E.).

Group	SOD (U/mL)	MDA (nmol/mL)	CAT (U/mL)	GSH-Px (U/mL)
NC	619.78 ± 19.49	5.35 ± 0.47	14.69 ± 1.86	1896.08 ± 90.90
AG	533.96 ± 16.29**	7.38 ± 0.66*	5.50 ± 0.75**	1572.55 ± 61.11*
CG	371.10 ± 2.71***	7.31 ± 0.55*	1.92 ± 1.71***	1545.10 ± 75.98*

*P < 0.05, **P < 0.01 as compared with NC.

Abbreviations: NC, the control group; AG, the aging group; CG, the constipation group.