Abstract:Objective:To study the influence of Ginkgo biloba exocarp polysaccharides(GBEP) on serum superoxide dismutase(SOD) activity and malondialdehyde(MDA) level in mice under different states.Method:GBEP was orally administrated to S180bearing mice,cyclophosphamide(CTX) intoxicated mice and normal mice.The contents of SOD and MDA in the mice‘s blood were checked.Result:GBEP significantly enhanced SOD activity and decreased MDA content in S180 bearing mice.Similar effects were observed in CTX intoxicated mice.In normal mice,however, no such effects were observed.Conclusion:GBEP may modulate the free radical system in mice under abnormal states.