Vegan Diets and Colon Cancer: The Role of Calcium

A meta-analysis of nine studies involving 1.8 million adults found that vegetarians have a lower risk for cancers of the pancreas, breast, prostate, and kidney as well as lower risk for multiple myeloma. Surprisingly, it also found that vegans had a 40% higher risk for colon cancer.
For a couple of reasons, I’m not especially alarmed by these findings. The authors noted that the statistical power was low since there were so few vegans with cancer in this study. They wrote:








