Attack ad targets hot dogs as cancer risk:

“Their report last November said eating 50 grams a day of processed meats for several years increases colorectal cancer risk by 21 per cent. That equals about one hot dog a day or two deli slices of bologna or five slices of bacon. The duration of daily consumption linked with that higher risk is uncertain. Colorectal cancer was diagnosed between three and 19 years after the studies began, but participants could have been eating processed meats for years before that, said dietitian Karen Collins, nutrition adviser with the American Institute for Cancer Research, a group that analyzed the studies. For a U.S. adult, eating one hot dog daily for several years would increase the average risk of getting colorectal cancer, which is 5.8 per cent, to 7 per cent”

a good clear article