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Among women, those who got the most food-based calcium were 28 percent less likely to get colon cancer than low-calcium women.
In men, calcium supplements only seemed to help protect against colon cancer; for women, supplements meant a lower risk for liver cancer, which is rare.
Some previous studies have linked diets high in calcium with prostate cancer but the current study found no such risk.
Adults who ate the most calcium also tended to be healthier overall than the others.
Northwestern University preventive medicine instructor Patricia Sheean called the results impressive. But she noted that all those in the study, AARP members, may have been healthier and wealthier than the general U.S. population so it's not clear if the results would apply to the wider population.
On the Net:
Archives of Internal Medicine: http://archinternmed.com/
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