Preliminary study showed that high dose curcumin & quercetin treatment for 6 months reduced precancerous tumors in the colon by 60% in humans.
www.ncbi.nlm.nih.gov
Curcumin inhibits multiple signaling pathways, which play key roles in cancer development and progression. There have been larger, randomized studies showing curcumin works in conjunction with other chemo drugs to more effectively kill cancer cells including chemo-resistant cancer.