The mechanism of SSII about antitumor inhibition might be the enhancing of the cellular immune function and the improving of the antioxidant capability in H22 tumor-bearing mice.

• 大豆皂甙增强H22荷瘤小鼠细胞免疫功能和提高机体抗氧化能力是其抑制肿瘤效应的机制。