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Corpet, Denis E.
Meat science, 11/2011, Volume: 89, Issue: 3Journal Article, Conference Proceeding
The effect of meat consumption on cancer risk is a controversial issue. However, recent meta-analyses show that high consumers of cured meats and red meat are at increased risk of colorectal cancer. This increase is significant but modest (20–30%). Current WCRF-AICR recommendations are to eat no more than 500 g per week of red meat, and to avoid processed meat. Moreover, our studies show that beef meat and cured pork meat promote colon carcinogenesis in rats. The major promoter in meat is heme iron, via N-nitrosation or fat peroxidation. Dietary additives can suppress the toxic effects of heme iron. For instance, promotion of colon carcinogenesis in rats by cooked, nitrite-treated and oxidized high-heme cured meat was suppressed by dietary calcium and by α-tocopherol, and a study in volunteers supported these protective effects in humans. These additives, and others still under study, could provide an acceptable way to prevent colorectal cancer. ► High consumers of red or cured meat are at increased risk of colorectal cancer (+25%). ► Recommendations are to eat less than 500 g red meat /week and to avoid processed meat. ► Beef meat and cured pork meat promote chemically-induced colon carcinogenesis in rats. ► A major cancer promoter in meat is heme iron, via N-nitrosation or fat peroxidation. ► Some dietary additives suppress heme-induced promotion and may prevent colon cancer.
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