Study shows lower risk for multiple myeloma as well as pancreatic, prostate, breast and kidney cancers Study shows lower risk for multiple myeloma as well as pancreatic, prostate, breast and kidney cancers Vegetarians have a substantially lower risk of five types of cancer, a landmark study on the role of diet has revealed. The research, using data from more than 1.8 million people who were tracked over many years, found that vegetarians had a 21% lower risk of pancreatic cancer, a 12% lower