Repeatedly fried cooking oil can not be used, because this oil after high-temperature refining, the fatty acids and unsaturated fatty acids will be chemical changes, the formation of some carcinogenic substances, often eat this oil, will make our body cells cancer. After repeated frying of cooking oil, at high temperatures will produce trans fatty acids, often eat this repeated frying of cooking oil, will make people have some chronic diseases.

Our country has strictly prohibited the use of second-hand oil, back to the pot of oil, in the catering industry there are also severe penalties about the use of gutter oil and unhealthy oil, in life, we have to minimize the use of repeated frying cooking oil.

We may see in our life, in this side often see some deep-fried small Fan will use repeatedly heated oil, the color of these oils and the color of the normal oil is different from the repeated frying of cooking oil, their color is very dark, like the color of soy sauce.

If you eat these fried foods is very dangerous to our health, because the general cooking oil after repeated frying, their color will change, the chemical composition of cooking oil is mainly triglycerides, in the clip something, the temperature of cooking oil will become very high, in the high-temperature environment, the cooking oil will undergo a series of chemical reactions.

Long-term use of repeatedly fried cooking oil, for people is extremely harmful, because repeatedly fried cooking oil in the process of frying will occur oxidation reaction, will produce a lot of volatile substances, these substances are basically toxic, especially acrolein, this substance is a very powerful carcinogen, basically in the oil smoke.

Secondly, when you fry something, the high temperature environment will make the cooking oil reaction, in the cooking oil will decompose a kind of thing called trans fatty acid, this kind of thing exists in a large number of junk food, long-term eat this kind of raw oil food is easy to lead to obesity, heart disease, diabetes, high blood pressure and a series of chronic diseases.