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Vitamin D helps lower chances of colorectal cancer

To test for a link between vitamin D and colorectal cancer, doctors compared 476 men and women with colorectal cancer to 476 men and women without colorectal cancer. Both groups of participants were of similar age, gender, and race, and both were examined at the start of the study as well as later on during follow-up. Men and women with the highest circulating levels of vitamin D were 40 percent less likely to have developed colorectal cancer compared to men and women who had the lowest vitamin D levels. Adjusting for other health factors that could affect chances for cancer and for seasonal variations in levels of vitamin D did not change the finding that vitamin D is beneficial. 

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