Processed meats - such as bacon, sausages and ham - do cause cancer, according to the World Health Organization.
Its report said 50g of processed meat a day - less than two slices of bacon - increased the chance of developing colorectal cancer by 18%.
Meanwhile, it said red meats were "probably carcinogenic" but there was limited evidence.
The WHO did stress that meat also had health benefits.
Cancer Research UK said this was a reason to cut down rather than give up red and processed meats and added that an occasional bacon sandwich would do little harm.
processed a. 加工过、处理过的
slice n. 薄片
colorectal a. 直肠结肠的
carcinogenic a. 致癌的
cancer n. 癌
evidence a. 证据
benefit n. 好处 益处
occasional a. 偶尔的