Raspberry

Medical tests released January 7, 1999 show that the red raspberry is one of the most effective all-natural ways to fight certain forms of cancer.
http://www.tremainefarms.com/Our%20cancer%20prevention%20page.htm

The Hollings Cancer instititute at the University of South Carolina is doing a double blind study on a large group of 500 cervical cancer patients that has everyone excited. They are excited because their past nine years of study have shown that a natural product called ellagic acid is causing G-arrest within 48 hours (inhibiting and stopping mitosis-cancer cell division), and apoptosis (normal cell death) within 72 hours, for breast, pancreas, esophageal, skin, colon and prostate cancer cells.
http://www.heall.com/healingnews/nov/red_raspberry.html

A cup of black raspberries a day may help keep esophageal cancer at bay.
Researchers found evidence in rats that black raspberries may both prevent the onset of esophageal cancer as well as inhibit precancerous growth already underway.
http://researchnews.osu.edu/archive/canberry.htm

It may seem improbable, but one of the best allies against sunburn and skin cancer could be growing in your own back yard.
http://www.sciencedaily.com/releases/2007/04/070418074348.htm