Fifty eight cases of osteoarthritis(OA) of knee joint were treated by oral taken Bushen Jiangu Tang(BSJGT).Before and after treatment the observation of oxygen free radical metabolism have been taken through the activity of superoxide dismutase(SOD) of RBC and the content of lipid peroxide(LPO) of serum.The results showed that before treatment SOD activity decreased significantly and LPO content increased markedly in patients with OA than that in controls(P<0.01).After treatment with BSJGT by oral administr...