2025-05-06
When purchasing frozen and quick-frozen foods, the following points should be noted
First, check the manufacturer and production date of the frozen food. The closer the food is to its shelf life, the more likely it is to deteriorate. Frozen food should be stored in a cold storage at a temperature below -18℃; otherwise, it is prone to deterioration. Frozen food is also prone to spoilage if stored for too long. Because the proteins in food can be decomposed to produce "soluble toxic proteins", "amines", "malodorous substances", etc., and these toxins are difficult to be destroyed even by high-temperature heating, it can cause gastrointestinal infections after human consumption. Experts remind that food that has been frozen for more than two months should be avoided as much as possible.
2. If the crystal frost on the packaging bag of frozen food is white and shiny, and the food is hard when frozen, it should be well preserved. Whether the packaging is damaged and whether the food is contaminated by bacteria; At the same time, it is necessary to pay attention to whether there are any mold spots or dryness on the food inside the packaging bag. If the food inside the bag is partially white, it is mostly due to excessive temperature changes, resulting in moisture loss and drying. In severe cases, it turns dark yellow.
3. Check whether the production label of frozen food has the food name, ingredient list, production date, shelf life, manufacturer, storage conditions, and consumption methods, etc. Experts remind citizens that when purchasing frozen food, they should try to choose products produced by well-known enterprises. In addition, after purchasing frozen food, it is essential to put it in the freezer of the refrigerator as soon as possible. If it has completely dissolved, it is best to consume it immediately. This is because refreezing frozen food after it has fully dissolved is very detrimental to the food itself and does no good to the human body.
How to defrost frozen food taken out of the freezer of a cold storage
Nutritionists believe that rapid thawing will cause the loss of proteins and vitamins in food, and at the same time accelerate the production of the carcinogen propionaldehyde. However, if the thawing process is too slow, it can easily lead to bacterial growth and is also inappropriate. The correct way to defrost is as follows: After taking the frozen food out of the freezer, place it in the cold storage first. After a few hours, take it out and soak it in cold water at around 15℃ until the frozen food is defrosted before use.
2. If the crystal frost on the packaging bag of frozen food is white and shiny, and the food is hard when frozen, it should be well preserved. Whether the packaging is damaged and whether the food is contaminated by bacteria; At the same time, it is necessary to pay attention to whether there are any mold spots or dryness on the food inside the packaging bag. If the food inside the bag is partially white, it is mostly due to excessive temperature changes, resulting in moisture loss and drying. In severe cases, it turns dark yellow.
3. Check whether the production label of frozen food has the food name, ingredient list, production date, shelf life, manufacturer, storage conditions, and consumption methods, etc. Experts remind citizens that when purchasing frozen food, they should try to choose products produced by well-known enterprises. In addition, after purchasing frozen food, it is essential to put it in the freezer of the refrigerator as soon as possible. If it has completely dissolved, it is best to consume it immediately. This is because refreezing frozen food after it has fully dissolved is very detrimental to the food itself and does no good to the human body.
How to defrost frozen food taken out of the freezer of a cold storage
Nutritionists believe that rapid thawing will cause the loss of proteins and vitamins in food, and at the same time accelerate the production of the carcinogen propionaldehyde. However, if the thawing process is too slow, it can easily lead to bacterial growth and is also inappropriate. The correct way to defrost is as follows: After taking the frozen food out of the freezer, place it in the cold storage first. After a few hours, take it out and soak it in cold water at around 15℃ until the frozen food is defrosted before use.
