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Vitamin D/Calcium Supplements Do Not Prevent Regrowth Of Intestinal Polyps

October 29, 2015: 12:00 AM EST
Vitamin D and calcium supplements do not prevent the regrowth of colorectal polyps, the precursors of cancerous tumors, a large U.S. study has found. The random, controlled study was conducted at 11 hospitals and involved 2,200 adults aged 45-75 who took 1,000 IU of calcium and/or 1,200 mg of vitamin D each day, or a placebo. Each study participant had a history of colorectal polyps without any remaining polyps after colonoscopy. After 3-5 years, researchers found that daily supplementation did not reduce the risk of recurrent colorectal adenomas.
John A. Baron et al., "A Trial of Calcium and Vitamin D for the Prevention of Colorectal Adenomas. ", New England Journal of Medicine, October 29, 2015, © Massachusetts Medical Society
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