Objectives    To study the effects of green tea rich with selenium and superoxide dismutase (SOD) on antioxidantability capacity in aged rats.     Methods    Thirty 14-month-old female SD rats were randomly divided into control group

ordinary green tea group and green tea rich with selenium and SOD group. The rats in the 3 groups were perfused with distilled water

ordinary green tea powder solution or the solution riched from the special tea

and fed with standard chow. Forty-five days later

the activity of SOD and glutathione peroxidase   (GSH-Px)

the content of    malondialdehyde (MDA) in their serum and livers as well as the total antioxidant capacity (T-AOC) in their serum were detected.     Results    The serum content of MDA of the ordinary green tea group was significantly lower than that in the control group (P0.01)

while the activities of SOD and GSH-Px in the blood serum and liver were markedly higher than the control group (P0.05). The rats in the green tea rich with selenium and SOD group had markedly better antioxidant capacity than the ordinary tea group and control group.     Conclusion    Green tea with or without selenium and SOD richness can improve antioxidant capacity of the aged rats

but the later is more effective.