The investigational new drug, MB-6, in the proposed clinical trial is to be used as an adjuvant therapy for metastatic colorectal cancer patients. All of six extracts have been used in human with a long history, and many literatures reported the medicinal use either individually or as ingredients of formulations. MB-6 may provide its therapeutic benefits via inhibition of tumor induction or enhancing the efficacy of chemotherapy in colorectal cancer.