1, coarse grains. Patients with renal cancer should not only eat flour and rice, but also eat some coarse grains properly. Rich in whole grains, it can alleviate the activity of carcinogens in the intestine. Rich fiber has been proved to have the effect of preventing intestinal cancer. Soybeans contain isoflavones, which help to prevent some cancers. Medical research has confirmed that eating 60 grams of soybeans every day: the effective anti-cancer concentration in blood is enough to inhibit the growth of half of breast cancer, endometrial cancer, ovarian cancer and prostate cancer.