Milk and yogurt are healthy drinks that we often come into contact with in our daily life. Milk provides a lot of protein, calcium and fat, and Xian Yi has a certain effect on insomnia. Yogurt is sour, sweet and delicious, and easy to pass, which endows milk with most nutrients and allows lactose intolerant people to digest and absorb the nutrients of dairy products. So people will always see a lot of milk and yogurt on the supermarket shelves for us to choose from, but it is very easy to buy dairy products, and how to preserve them is the key.

A lot of milk is usually packed in a big bottle. Although the price is more cost-effective, it is obvious that large bottles of milk are not so friendly to single men and women. You can't drink so much milk at a time, so you can only put it in the refrigerator, but many people say that drinking fresh milk with ice will cause diarrhea and stomachache for some reason. Is it because the method of storing milk is wrong, which leads to the growth of milk bacteria?

In fact, storing dairy products is not as inconvenient as everyone thinks. Consulting a nutrition expert, the nutrition expert revealed in one sentence that the main reason why people drink iced milk will have diarrhea is that the milk has passed the shelf life. Except those who suffer from lactose intolerance, drinking pure milk will cause stomachache, and drinking ice or cold water will cause stomachache. If milk is stored in the refrigerator for more than a certain period of time, it will also make you have diarrhea.

In that case, the problem comes. At present, there are many dairy products on the market, including normal temperature milk, normal temperature yogurt, ultra-low temperature milk and low temperature yogurt. How should so many dairy products be preserved after they are bought, so as to maximize the service life of dairy products?

Ultra-low temperature milk can also be called pasteurized milk. Pasteurization only solves the problem that most bacteria harmful to human health exist in milk and a few microbial strains survive, which also makes it necessary to keep the temperature of the refrigerator at 2℃ ~ 6℃ during transportation, so that the microbial strains in milk can sleep. This milk can be stored for 5 ~ 7 days before opening, and you must drink 1 ~ 2 days after opening, otherwise, bacteria will multiply in large numbers and it is easy to have a stomachache.

Normal temperature milk refers to milk sterilized at high temperature in an instant. Generally, the shelf life of tetra pak packaging is relatively long, and it can be kept for nearly one year at room temperature. There is no need to add additives, because the instantaneous high temperature is enough to kill bacteria, and the milk is sealed and packaged to keep fresh. This kind of milk is suitable for taking out anytime and anywhere. Once opened, it is recommended to put it in the refrigerator and drink it within 5 days.

Low-temperature yogurt is the most common yogurt on the market at present. This kind of yogurt is a lactic acid bacteria beverage which uses refrigeration temperature to inhibit the excessive activity in yogurt. If you take out the low-temperature yogurt and drink it for two days, you will find that the yogurt is very sour and difficult to pass, mainly because the energetic lactic acid bacteria beverage is full of vitality after the temperature rises, which makes the yogurt more and more sour and more unpalatable. Therefore, low-temperature yogurt should be refrigerated because it can manipulate lactic acid bacteria drinks.

Normal temperature yogurt is a kind of lactic acid bacteria beverage which is fermented at low temperature and aged for a long time according to pasteurization. The taste of yogurt will not become more and more sour, and the taste can be effectively controlled by reducing this high-energy lactic acid bacteria beverage. Therefore, this kind of yogurt at room temperature will be preserved for one year at room temperature as long as it is unopened. Like the normal temperature milk above, it is easy to carry and can be drunk at any time. There is no temperature limit.

Let's make a conclusion at last. Pasteurized milk is actually fresh milk. Please follow the instructions on the outer packaging of the product before opening the package. Don't drink after the expiration date. Open the refrigerator for refrigeration. It will take more than two days to finish it. Normal temperature milk is unopened, but it is also packaged with a shelf life and can be stored in the refrigerator for 5 days. Yogurt at room temperature is generally not large. It can be stored at room temperature for half a year without opening, and can be drunk once after opening. Low-temperature yogurt is generally small in size, so you should follow the shelf life before opening and drink it once after opening.