Vitamin D Fights Colon Cancer

But Colon Cancer Protection Limited to the Lean and Active WebMD 7/10/07 "People with higher blood levels of vitamin D are less likely to get colon cancer...Harvard School of Public Health researcher Kana Wu, MD, PhD, and colleagues looked at data from a large, ongoing study of male health professionals who provided blood samples for analysis. The researchers compared vitamin D levels in the blood of 179 study participants who developed colon or rectal cancer with those of 356 matched participants who did not get cancer...Wu and colleagues find that the colon cancer-fighting benefit of vitamin D may be limited to people who are not overweight and who exercise regularly. That's because overweight, sedentary individuals tend to suffer insulin resistance, which may increase risk of colon cancer..."We found that the [colon cancer-protective effect of vitamin D] was much stronger for both lean and physically active men and women but much weaker in overweight and inactive individuals,"..."

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