Can I still eat the meat and vegetables I bought in the refrigerator for a week？

　　"It’s cold, do you want to save something to eat?"

　　"Rice and oil are easy to say. Can vegetables be eaten after a week in the refrigerator?"

　　Epidemic prevention and control has entered a normal state, but many friends have become accustomed to "hoarding" food in the refrigerator — — So, are meat and vegetables frozen or refrigerated? How many degrees is the most suitable for preservation? Can I eat it after a week?

　　Meat should be "cold" and vegetables will be "frozen"

　　The bought fish can’t be kept, and the vegetables will rot in the refrigerator for a few days. Is the meat taken home refrigerated or frozen … … "hoarding goods" not only makes the elderly scratch their heads, but also makes the young people confused.

　　"Generally speaking, the requirements for the preservation environment of various foods are different, and it is definitely not possible to stuff them all into the refrigerator." According to industry insiders, in professional supermarkets, the storage temperature of all kinds of foods is relatively fixed; Consumers pick and choose and take them home and stuff them into the refrigerator, often only to find that they have gone bad when they eat them.

　　"If you go to a big supermarket like Metro in summer, you may have to bring a thick coat to the meat sales area." The reporter learned the "best storage temperature" of different foods in Metro: frozen products are at-18℃ ~-22℃, cold meat is at 0-4℃, fish is at 12-16℃, and fruits and vegetables are at 12-14℃; Therefore, even in summer, the area where meat products are sold is very "frozen". The person in charge of the Metro member store said: "Different foods require different storage temperatures, and only by taking correct temperature control measures can the freshness, hygiene and safety of foods be guaranteed."

　　In general, the freezing temperature of household refrigerators is -18℃, while that of cold storage rooms is 0-4℃. Therefore, the cold meat bought home can be stored in the cold storage room if it is eaten soon, and there is no need to freeze it. In the current weather, fruits and vegetables don’t have to be put in the refrigerator when they are bought home. They can be stored at room temperature and eaten as soon as possible. It should be noted that even frozen food should be eaten within 90 days; The flavor and nutritional value of foods frozen for too long will be greatly reduced even if they are not "spoiled".

　　Constant temperature in the whole process is very important, and "thawing and freezing" is not advisable.

　　If you buy too much meat and freeze it, take it out and cut it, and put the rest back, okay? The answer is: no.

　　"Frozen food is easy to breed bacteria during repeated thawing and freezing." Nutrition experts said that some institutions have done relevant comparative tests, frozen and thawed the same piece of meat for four times, and carried out bacterial inspection every time. The results showed that the total number of colonies increased sharply after thawing and refreezing, and the total number of colonies in the last time was 15 times that of the first inspection.

　　The reason is that food will inhibit the growth of bacteria when it is frozen at low temperature, but in the process of thawing, with the increase of external temperature, bacteria in food will multiply rapidly; When we put the food in the refrigerator again, the low temperature environment can inhibit the growth of bacteria, but it can’t "kill" the bacteria that grew before. When it is thawed again, the bacteria will double.

　　"Big supermarkets can guarantee the ‘ of purchasing, processing and sales areas; Whole cold chain ’ But often consumers don’t care after buying it back, which will lead to food deterioration, "nutrition experts pointed out." Therefore, fresh products should be put into the freezer immediately and frozen products should be put into the freezer as soon as Metro, a supermarket that takes a "whole cold chain" approach to meat, comes home, keeping the "last link" still in the cold chain.

　　If you can’t eat it all at once, it is recommended to freeze it in small pieces and thaw as much as you eat. Whether consumers purchase frozen products or fresh ingredients themselves, it is better not to "thaw twice" after freezing. Zhang hongmei