Do not brush the pan after cooking: the seemingly clean pan surface will be attached with grease and food residue, and high temperature heating again may produce carcinogens such as benzopyrene. Therefore, I suggest that you carefully clean the pot after frying a dish and before frying the next dish.

Turn off the range hood immediately after cooking: A lot of harmful substances will be produced in the process of cooking, and the range hood plays a very important role in eliminating exhaust gas. Some people like to turn off the range hood immediately after cooking. In fact, it takes time for the range hood to exhaust the exhaust gas, and there is still unfinished exhaust gas in the kitchen after cooking. After frying, let the range hood continue to operate for 3~5 minutes to ensure the complete discharge of harmful gases.

Like to eat overnight dishes: overnight dishes will not only lose a lot of nutrients, but also easily breed bacteria. For people with weak gastrointestinal function, it is easy to have diarrhea after eating; On the other hand, overnight vegetables will produce nitrite. When it enters the stomach, it will react with protein to produce nitrosamines with carcinogenic effects. Long-term consumption may lead to cell mutation and induce gastric cancer.

When cooking, the oil smokes before cooking: when the oil pan starts to smoke, it means that the oil temperature is already quite high. Adding ingredients at this time will not only destroy the nutrition in food, but also change protein, fat and carbohydrate in food at high temperature, resulting in carcinogens.

Please note that these hidden dangers are not absolute, but in order to improve health awareness, it is recommended to avoid these risks as much as possible.