A cancer prevention diet, Romano explains, "is not about particular foods that increase or decrease risk, but how easy foods are to absorb." A healthy gut is a pleasant environment for disease-fighting cells. But you can change the quality of your intestinal environment in either direction by changing the food you eat. Shifting the balance can lead to what Bontempo calls "a cascade of inflammatory cells," creating a hostile environment and leading to abnormal cell proliferation, particularly colon, pancreatic, endometrial, and even prostate cancer cells.