The present invention relates to a method of inhibiting growth of a cancerous cell. The method includes the step of exposing the cancerous cell to an anti-cancer therapy and an effective amount of a steroid saponin.本發明與一種抑制癌細胞生長的方法有關。此方法包括使癌細胞接受一抗癌療法及一有效量之甾體皂苷的步驟。