Most information provided about "this" causing cancer and "that" causing cancer of sorts is usually transcribed in order to give some writers "filler" material when nothing else is available to write about. Other times its used as a way to entrap readers and their since of fear of the unknown in order to increase sales of there magazines, articles, and periodicals.
Sadly in most cases these "fear factor" stories have very little founding and in all honestly anything in excess can kill you. Even too much water believe it or not :-)
Sometimes we cannot stop the inevitable all we can do is do our best to control our eating habits, make better choices, and ensure we have some type of fitness program to keep our systems cleaner.