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Calcium curbs risk of colon polyps

Daily calcium supplementation protects against colon polyps, particularly the advanced type that go on to become cancer. Calcium supplementation has been tied to a modest reduction in the overall risk of pre-cancerous polyps. However, few studies have examined the effect of calcium on the risk of different types of (colon) lesions.

Calcium curbs risk of colon polyps

Daily calcium supplementation protects against colon polyps, particularly the advanced type that go on to become cancer. Calcium supplementation has been tied to a modest reduction in the overall risk of pre-cancerous polyps. Few studies, however, have examined the effect of calcium on the risk of different types of colon lesions. Researchers from the Dartmouth-Hitchcock Medical Center in Lebanon, studied 913 participants who took either a calcium supplement or an inactive 'placebo' each day. The subjects were followed for four years to compare the occurrence of colon polyps. It was found that all types of polyps occurred less frequently in the calcium treatment group than in the placebo group. Also, calcium use reduced the risk of all polyps by 14 percent and the risk of advanced polyps by 35 percent. The findings also suggest that a total daily calcium intake greater than 1200 mg as well as a high intake of dietary fibre and a low intake of fat is needed to 'optimise' the preventive effects of calcium. The above research shows that the calcium effect is particularly pronounced for advanced polyps, those with the closest connections to cancer.
Journal of the National Cancer Institute,
June 2004

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