A review of 40 studies on gastrointestinal
cancers found a 21 to 43 percent lower
cancer risk with high intake of whole grains compared to low intakes.21 Although studies examining the risk of hormone -
dependent cancers are limited, the same review found that subjects in the highest category of whole grain intake had a 10 to 45 percent lower risk of
endometrial cancer and a 37 to 40 percent lower risk for ovarian
cancer.21