Cauliflower and other cruciferous vegetables, such as broccoli, cabbage, and kale, contain compounds that may help prevent cancer. These compounds appear to stop enzymes from activating cancer-causing agents in the body, and they increase the activity of enzymes that disable and eliminate carcinogens.
Epidemiological studies have long suggested a connection between these vegetables and resistance to cancer. However, only in the past decade have we begun to understand how these compounds work. ?(from WHFoods)