Olive oil is more effective when used as frying pan oil. The researchers also found that using oils with particularly high unsaturation, such as sunflower seed oil, is more effective than using olive oil as frying pan oil. People usually have a misunderstanding that olive oil can't be heated, but soybean oil can be heated. This is a misunderstanding. In fact, olive oil is mainly monounsaturated fatty acids, while soybean oil, sunflower oil, safflower oil and corn oil are mainly polyunsaturated fatty acids. The higher the unsaturation of fatty acids, the worse their heat resistance. When heated, they are more prone to oxidative polymerization, hydrolysis, cracking, cyclization and other reactions, which are more harmful to human body. Palm oil, butter, etc. They are used in industrial fried foods precisely because they are rich in saturated fatty acids and have strong thermal stability.

There is another great danger in cooking and stewing fish with these oils rich in unsaturated fatty acids, that is, the cholesterol in animal foods may be oxidized into oxidized cholesterol. More and more research evidence shows that cholesterol in food itself does not necessarily cause the increase of blood lipid, nor is it directly related to the risk of heart disease; However, oxidized cholesterol is the chief culprit that damages vascular endothelium and leads to arteriosclerosis. When cooking, some cholesterol in fish eggs will be mixed with cooking oil. If these oils are heated repeatedly, cholesterol will be oxidized with unsaturated fatty acids, which will bring danger to people. Why do people who often eat out get high blood pressure and coronary heart disease? Having said that, everyone can think of why there are so many patients with chronic diseases such as hypertension, coronary heart disease and diabetes among people who often eat out. In addition to the unreasonable diet itself, repeated use of edible oil is also an important risk factor. When eating out, it is suggested to put more stews, steamed vegetables and cold dishes, and reduce the proportion of stir-fry and stir-fry, so as to minimize this risk.

On the other hand, when cooking at home, don't oil dishes in the way of chefs, as taught in food programs such as "Daily Diet". Let's eat at home, don't make it look like a restaurant. Eating at home is light, safe, comfortable and nutritious.