You can't eat food overnight, but it depends on how to store it overnight. It is best not to eat leftovers, leftovers, soup and pot-stewed food that stay overnight at room temperature, which is easy for bacteria to multiply and cause diseases such as diarrhea.

Leftovers and leftovers should be stored at room temperature for no more than 4 hours, and not more than 2 hours when the temperature is high. It is suggested that it is safer to box leftovers and put them in the refrigerator when there is still residual heat. Bacteria reproduce fastest at 20-30℃, so it is necessary to cool down to cold storage conditions as soon as possible. Leftovers need to be thoroughly heated before eating, and should not be stored in the refrigerator for too long.

The main component of rice is starch. Starch is hydrolyzed into dextrin and maltose by oral saliva amylase. After passing through the stomach and entering the small intestine, it is decomposed into glucose and then absorbed by the intestinal mucosa. Starch expands gradually after being heated above 60℃, and finally becomes paste. This process is called gelatinization. Digestive enzymes in human body will hydrolyze this gelatinized starch molecule, and after gelatinized starch is cooled, it will produce "aging" phenomenon.

If the aged starch molecules are reheated, even at high temperature, it is impossible to return to the molecular structure when gelatinized. The human body's ability to hydrolyze and digest this aged starch is greatly reduced. Long-term consumption of this reheated leftovers can easily lead to indigestion and even stomach problems. Moreover, the digestive ability of the elderly is weak, and it is best not to eat or eat less cold rice or cooled and reheated rice.

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How to preserve leftover rice?

1 Move the rice to a small pot of appropriate size.

Leftover white rice should not be stored in the original cauldron, because it is not convenient to put it in the refrigerator, so it is best to put it in a small pot with a cover and then put it in the refrigerator.

2. Stir the rice grains loosely

After the leftover rice is moved to a small pot, stir it with a spoon and loosen it before putting it in the refrigerator. If it is not completely cooled, it can be placed on the dining table or in a ventilated place first, and then put it in the refrigerator for preservation after it is completely cooled.

Leftovers will become hard when they lose water, but the water vapor generated by heat will easily deteriorate the rice. The loosened rice won't form a lump when it is taken next time, but it is easier to stir the rice when the rice grains are still warm. If it becomes hard after cooling, especially after refrigeration, it is not easy to let the rice grains disperse again.

3. Cover and refrigerate

The cooled rice is covered and stored in the refrigerator. Covering can prevent the moisture of rice from being absorbed by the refrigerator, and at the same time, it can prevent the rice from being contaminated with the taste of other foods.

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People's Daily Online-Overnight rice should not be eaten too much. How to preserve leftover rice?