Here's one possibility. Foods that are high in fiber will have more omega 6 fatty acids than foods high in omega 3 oils, and it is theorized that a healthy intake of healthy fiber, as in beans, nuts, vegetables, and whole grains, reduces the chances of getting any type of cancer, though we usually think only of colon cancer for this. Omega 6 fatty acids aren't bad for you, and there are many different ones, some of which are as good for you as omega 3 fatty acids, such as GLA.