Things to note when buying milk in supermarkets

　　One: Find the right place to buy milk.

　　Just go buy the pasteurized milk that's on the freezer. “"Pasteurized milk" is milk that needs to be preserved at low temperatures, commonly known as "low-temperature milk". It is fresh milk that is sterilized and filled at 80 degrees Celsius for a short period of time. This kind of milk is the freshest, has nutritional value close to that of fresh milk, and has the best taste. The disadvantage of pasteurized milk is that it has a short shelf life. It can generally be stored for 2-3 days, and can only be stored for a week at most. If you don't have time to go to the supermarket every now and then, it is recommended that you buy "sterilized milk" and "UHT milk." These two types of milk have undergone high-temperature sterilization, resulting in greater nutritional loss and worse flavor than pasteurized milk, but they can be stored at room temperature for 4 months.

　　Two: Choose the right packaging.

　　After finding the right place to buy milk, it’s time to choose the packaging. There are four main types of milk packaging. One is the rooftop bag, which looks like a small house and contains pasteurized milk. The shelf life is generally about 7 days. The second is plastic bags. Pasteurized milk can only be stored for 2-3 days; ultra-high temperature sterilized milk can be stored for 30 days. The third is Tetra Pak, specially packed with ultra-high temperature sterilized milk, which can be stored for 4-6 months. The fourth is plastic bottles, which can be stored for a year. When I buy pasteurized milk, I choose rooftop bags; and if I need to buy sterilized milk, I choose Tetra Pak and try not to buy it in plastic bottles. Finally, pick it up and look at the packaging. If it is deformed or swollen, don’t buy it.

　　Three: When purchasing milk, be sure to read the label.

　　After selecting the packaging and deciding on the type, it’s time to judge the quality and “authenticity” of the milk through the label. I first look at the protein content on the label - if the protein per 100 grams of milk is greater than or equal to 2.9 grams, it is considered pure milk, otherwise it is a "deceptive" milk drink. In addition, the higher the protein content of milk, the better the quality. Secondly, look at the fat content. People with high blood lipids and those who need to lose weight can choose low-fat or skimmed milk, but children and office workers are better off drinking full-fat milk. When buying, be sure to check the date and buy the one closest to the factory date. Otherwise, it will easily expire if you don’t pay attention when drinking.

　　Four: When choosing milk, stick to the inside.

　　When buying milk, you must learn to hold it from the inside. Because they are not exposed to light, the temperature is more constant and there will be less nutrient loss. In addition, generally speaking, the milk in the inner and upper rows is closer to the production date.