After understanding the principle of choosing ingredients, learning the scientific way of cooking is equally important for dietary cancer prevention. Xun Xiaolin pointed out that even good food, after unreasonable cooking methods, will produce many chemical carcinogens, so it is best to master the “three reduction” principle. Reduce pesticide residues Fertilizers, pesticides and other residual chemical substances and cancer are closely related. In addition to urging the relevant departments to increase regulatory efforts, in their daily lives, the people can also take some measures to reduce pesticide residues harm. China Agricultural University School of Food Science and Nutritional Engineering Professor Jiang Microwave suggested that cucumbers, peppers, carrots, bitter melon, etc. can be soaked in warm water for 1 to 2 minutes, and then scrubbed with a brush; cabbage, cabbage, etc. can be removed from the periphery of the leaf, one by one, with running water to rinse the internal leaves; winter squash and other non-perishable vegetables can be irradiated by sunlight, so that the pesticide residues decomposition. Reduce frying Xun Xiaolin said, frying process, a little careless, the oil temperature is too high, will produce a lot of benzo(a)pyrene, acrylamide and other carcinogens, repeated frying in the oil, carcinogens more. Studies have shown that people who often eat fried food are more likely to suffer from lung cancer, intestinal cancer and so on. In addition, cooking methods such as barbecuing and marinating form many carcinogens. In contrast, steaming, boiling and stewing are healthier and low-carbon. If you really can’t resist the temptation of barbecue food, you can eat a kiwi after a meal to reduce the damage. Reduce salt Salt and cancer also have a “relative” relationship. Shi Hanping, chief physician of general surgery at the First Affiliated Hospital of Sun Yat-sen University, pointed out that among Asian countries, South Koreans love to eat the most salty, and at the same time, the incidence of stomach cancer is very high. Japan and China follow closely, the incidence of stomach cancer is not low. Therefore, it is best to eat a light diet. In addition to eating salt per person per day, the best not to exceed 5 grams, cooking, but also pay attention to the existence of “hidden salt”, monosodium glutamate (MSG), soy sauce, sauces, seasoning packets also contain salt.