Check out a brand new publication in PLOSone on the prevention of cancers caused by a dietary carcinogen referred to as PhIP (produced in meats cooked at high temperatures) by eating a diet rich in tomato and broccoli! Lead author Dr. Kirstie Canene-Adams was formerly a post-doctoral fellow at Johns Hopkins and is currently an Assistant Professor in the Nutrition and Foods Program, School of Family and Consumer Sciences at Texas State University.
http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0079842