From Scientific American:
In the ongoing war on cancer, researchers have enlisted a new series of soldiers: roots and vegetables. New findings presented at the American Association for Cancer Research show that a grocery list of vegetables including ginger, hot peppers and cauliflower show promise as cancer-combating agents.
Pharmacologist Shivendra Singh of the University of Pittsburgh and his colleagues showed that a chemical released when cruciferous vegetables–such as cauliflower, broccoli and cabbage–are chewed helps control human prostate tumors grafted into mice. Phenethyl-isothiocyanate, or PEITC, prompted the prostate cancer cells to kill themselves in a process called apoptosis. By the end of a 31-day treatment cycle, treated mice had tumors nearly two times smaller than their counterparts.
Finally, at the same meeting, obstetrician J. Rebecca Liu of the University of Michigan and her colleagues reported that ginger powder, roughly the same as that sold in supermarkets, killed ovarian cancer cells in vitro both by triggering apoptosis and inducing them to cannibalize themselves, a phenomenon known as autophagy.
More here. Also see my Rx column on Spicing Cancer Treatment.