Skip the fish?

Eating fish and other foods high in omega-3 fatty acids doesn't have the wondrous effect on preventing malignancies that it seems to have in warding off heart disease.

As a cancer preventive strategy, omega-3 was left high and dry, reported Catherine H. MacLean, M.D., Ph.D., and colleagues at Rand Health in the January 25 issue of the Journal of the American Medical Association.

Source: http://www.medpagetoday.com/HematologyOncology/BreastCancer/tb/2545