Vitamin D Reduces Risk for Colon Polyps

Both the level of vitamin D in the blood and intake of vitamin D-rich foods decrease the risk of colorectal polyps in a number of studies.

Analyzing published studies of blood levels of vitamin D, researchers found a 30 percent decrease in the risk of adenomas among people with the most circulating vitamin D compared to those with the least.  The highest vitamin D intake decreased adenomatous polyp risk by 11 percent.

In addition, there appeared to be an even stronger relationship between both blood levels and vitamin D intake for advanced adenomas, with the highest risk of cancer.  Higher blood levels decreased risk of advanced adenomas by 46 percent, greater intake of vitamin D by 23 percent.

Melissa Wei and her colleagues concluded,

Both circulating 25(OH)D and vitamin D intake were inversely associated with colorectal adenoma incidence and recurrent adenomas. These results further support a role of vitamin D in prevention of colorectal adenoma incidence and recurrence.

SOURCE: Wei et al., Cancer Epidemiology, Biomarkers, and Prevention, Volume 17, Number 11, November 2008.


  1. Kate Murphy says

    The focus on this research was on colon polyps that are identified during a colonoscopy. I don’t think that it would be fair to infer that the same thing is true for bladder polyps — but it might be.

    It would be important to search for research that is being done with other polyps in other organs.

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