1. The best time to put oil in: The oil should be put in when the pot is 80% hot, because when the oil temperature reaches above 200℃ when cooking, a harmful gas will be produced, which is the main component of oil smoke. It also causes the oil to produce large amounts of peroxides, which are highly carcinogenic. 7LR Recipe Network Fuzhou Food

2. Pay attention to the reasonable use of food colorings: processed foods should not use colorings. When necessary, natural colorings should be used, and not excessive. Currently, the standard dosage of the four pigments approved by China is no more than 0.5 parts per thousand of carmine. 7LR Recipe Network Fuzhou Food

3. When to add salt: When cooking with soybean oil and rapeseed oil, in order to reduce the loss of vitamins in the vegetables, salt should generally be added after the vegetables are fried; When cooking with peanut oil, since peanut oil is easily contaminated by Aspergillus aflatoxin, salt should be placed in the fryer first, which can greatly reduce aflatoxin. If you use meat oil for cooking, you can first add half of the salt to remove organic pesticide residues in the meat oil, and then add the remaining half. 7LR Recipe Network Fuzhou Food

4. The best time to put cooking wine and MSG: The best time to put cooking wine is when the temperature in the pot is the best. MSG is best added when the pot is boiling. Because when heated above 120°C, MSG will turn into coked monosodium glutamate, which not only has no umami flavor, but is also toxic. In addition, it should be noted that excessive intake of MSG will put various nerve functions in the human body into a state of resistance, resulting in adverse reactions such as dizziness, headache, and muscle atrophy. In addition, the elderly, infants, and patients with high blood pressure and kidney disease should avoid or eat less MSG. 7LR Recipe Network Fuzhou Food

5. Time to put soy sauce: boiling soy sauce at high temperature for a long time will destroy its nutrients and lose its umami, so it is better to put soy sauce just before taking it out of the pot. In addition, patients taking drugs to treat cardiovascular diseases, gastrointestinal diseases, and anti-tuberculosis should not eat too much soy sauce