Foods, high in calcium might help reduce the risk for colorectal cancer, and that using calcium supplements modestly reduces the formation of colorectal adenomas (polyps). But there is also evidence that a high calcium intake, mainly through supplements, is linked with increased risk for prostate cancer, especially for prostate cancers that are more aggressive. In light of this, both men and women should try to get the recommended levels of calcium, mainly from food sources.
Recommended intake levels of calcium are 1,000 mg/day for people ages 19 to 50 years and 1,200 mg/day for people older than 50.
Dairy products are excellent sources of calcium, as are some leafy vegetables and greens. People who get much of their calcium from dairy products should select low-fat or non-fat choices to reduce their intake of saturated fat.
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