According to the World Health Organization (WHO), processed meats, such as bacon, sausages and ham, can cause cancer.
Its report said 50 grams of processed meat a day - less than two slices of bacon - increased the chance of developing colorectal cancer by 18%.
Retired cancer researcher, Dr Carl Albrecht said food manufacturers will have to improve the research into the preservatives used in processed meats and label carcinogenic products accordingly.
We've been suspecting something like this for more than 20 years, but there hadn't been enough data - until WHO released these findings.— Dr Carl Albrecht, former head of research at CANSA
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The WHO report also said red meats were "probably carcinogenic" but there was limited evidence, and the health body did stress that meat also had health benefits.
Meanwhile, meat producers and some health experts have hit back at claims published on Monday.
This article first appeared on 702 : 'Food manufacturers need to beef up research and label cancer-causing meats'