...illustration of the power of plant foods to assist in cancer prevention and possibly even to combat the effects of aging was provided by the United States Department of Agriculture (USDA). They recently attempted to rate foods according to their measured natural antioxidant properties. Although they used only one group of free radicals (the peroxyls) in their testing, the University of California at Berkeley championed the research on the headlines of their March 1997 newsletter. The top ten fruit and vegetable sources of antioxidants from this USDA research are:
http://www.cps.org.yu/Innerpeace/Health/cancer.html