Grape seed. “Studies have found that grape seed extracts may prevent the growth of breast, stomach, colon, prostate, and lung cancer cells in the laboratory…Free radicals are believed to contribute to the aging process as well as the development of a number of health problems, including heart disease and cancer. Antioxidants found in grape seeds can neutralize free radicals and may reduce or even help prevent some of the damage they cause.”
http://www.nutritionresearchcenter.org/healthnews/5-foods-that-fight-cancer/