This explains its major effectiveness against a  broad collection of tumors and its lack of toxicity at normal doses. In testing in the lab, MBZ  had high activity against leukemia, colon cancer, and melanoma with lesser activity against  ovarian, renal, and non-small cell lung cancers.¹³ In colon cancer, 80% of cell lines were  sensitive to MBZ. This explains its major effectiveness against a  broad collection of tumors and its lack of toxicity at normal doses. In testing in the lab, MBZ  had high activity against leukemia, colon cancer, and melanoma with lesser activity against  ovarian, renal, and non-small cell lung cancers.¹³ In colon cancer, 80% of cell lines were  sensitive to MBZ. This explains its major effectiveness against a  broad collection of tumors and its lack of toxicity at normal doses. In testing in the lab, MBZ  had high activity against leukemia, colon cancer, and melanoma with lesser activity against  ovarian, renal, and non-small cell lung cancers.¹³ In colon cancer, 80% of cell lines were  sensitive to MBZ. This explains its major effectiveness against a  broad collection of tumors and its lack of toxicity at normal doses. In testing in the lab, MBZ  had high activity against leukemia, colon cancer, and melanoma with lesser activity against  ovarian, renal, and non-small cell lung cancers.¹³ In colon cancer, 80% of cell lines were  sensitive to MBZ.