Another European study suggests that the higher your levels of vitamin D the lower your risk of developing colorectal cancer. The EPIC study, which stands for European Prospective Investigation into Cancer, enlisted over 500,000 adults from 10 countries. None of the subjects had cancer at the start of the study. Vitamin D levels were measured at that time.
After several years 1248 people had come down with colorectal cancer. The investigators matched them to 1248 EPIC participants who were not diagnosed with cancer and compared the vitamin D levels. Those with the highest levels of this hormone were 40 percent less likely to have developed colorectal cancer.
[British Medical Journal Online First, Jan 22, 2010]