They also contain indole-3-carbidol (I3C), which helps prevent estrogen
driven cancers. Other cruciferous vegetables are: arugula, bok choy, chard, Chinese cabbage, collard greens, daikon, kohlrabi, mustard greens, radishes, rutabagas, turnips and watercress.
Curcumin (turmeric). Curcumin, the major ingredient of the spice turmeric, has been a rising star against cancer in recent years.