Since unbalanced diets may increase the carcinogenic risk for certain organs, a balanced form of nutrition is to be recommended from the present point of view. It can also be recommended to avoid hyperalimentation, since this seems to have a positive effect on the cancer mortality risk; furthermore, ideal-weight individuals run a definitely lower risk of suffering a cardiac infarct than overweight individuals. Certain anticancer diets cannot be established. But the intake of juices and salads with a high vitamin C content can inhibit the formation of nitrosamines directly after the intake of food, because the nitrosation is prevented by nitrite interception. Negative influences of diets with a high fiber content are not known. Positive effects are discussed. Since it also prevents obstipation, it can well be recommended.