It is best to heat it in a microwave oven. The loss of nutrients in rice is not due to any heating method, but because some chemical reactions began to occur in the seasoning after more than 4 hours, and nitrite increased. It is suggested that if you bring rice, you should pack it separately and bring less vegetables.

When the insulated lunch box reaches 30-40 degrees Celsius, a large number of bacteria will breed, and the microwave oven can sterilize at high temperature. The dishes cooked in the morning are put into an insulated lunch box at high temperature and eaten directly at noon without heating, which is very easy to cause food deterioration and very unhealthy. Food is kept warm for a long time when the temperature drops to 30-40 degrees, which is very suitable for bacterial reproduction.

The special lunch box for microwave heating meals is usually marked with the word PP(5), which means that microwave heating is safe. At present, microwave ovens can only heat food-grade PP plastics. (Note: Although PP plastic can be heated by microwave oven, it must not be heated at high temperature for too long when it comes into contact with polymer foods (such as oil and sugar), otherwise it will burn PP plastic. Food preservation: food should be preserved in a low temperature environment, heated in a microwave oven and sterilized before eating.

In addition, it is not suitable to use rice as green leafy vegetables. If you don't know what kind of food is suitable for carrying, you can go to the big supermarket to see what kind of food is heated by microwave oven and see how others do it. You can also buy a copy of everything at home, study it carefully, and then look for the corresponding recipes online. In this way, you can draw inferences from others, eat healthy and delicious food, greatly reduce your living expenses and improve your life skills and fun.