/ Edited by the editorial department It's almost time to reach Zhongyuan Pudu. Canned noodles and instant noodles are a cult food on this occasion. Experts remind you that when buying canned food, you should pay attention to the problem of canned food. Box expansion. If there are signs of collision on the box body, do not use it. In addition, after opening, it must be consumed within a week. The one-year shelf life stated on the outer packaging refers to the period it can be stored for before opening.
Canned foods have a sterilization process which is beneficial for long-term storage at room temperature
Cai Minlang, professor at the Department of Food food of the Ocean. The University stated that when manufacturing canned foods, sterilizationCommercial odors are used, kill microorganisms that cause disease and spoilage, and can be stored at room temperature for a long time. Therefore, canned fruits can be stored for a long time, regardless of preservatives. . Cans made of different materials, whether metal cans, glass jars, or sterilized soft bags, are all canned foods. In terms of food safety, canned foods made from different materials are safe and can be consumed with confidence.
Cai Minlang also said that common metal cans include tin cans and aluminum cans, which are often used in highly corrosive foods, and epoxy resin and other coatings are often used inside boxes for separate protection. food for the bodymetal can, so you don't have to worry about eating heavy metals when eating canned food.
Liu Yili, a nutritionist at Taiwan Adventist Hospital, said that because the larger the size, the more cost-effective the price, many people buy large-capacity cans. If you buy a canned food and can't finish it for a while, someone puts it in the refrigerator, thinking it won't go bad. However, in fact, once the canned food is opened and there is no lid to cover it, it is lost. can still mold and reproduce microorganisms even in a refrigerated environment.
Liu Yili suggested that if you open the box and can't finish it, you should pour the food into a crisper and store it in the refrigerator. Or choose directly from products packaged in boxesGlass ears, fitted with a lid, as long as they are tight, they will always have a preserving effect of freshness.
When you buy metal cans, you need to check their appearance. Do not eat if you find any abnormalities in the food after opening it
Cai Minlang reminded. that when buying canned fruits, be sure to check the appearance and choose the appearance. If a complete and undamaged box is bulging, rusty, deformed or corroded, it means that the food contained in the box is deteriorated or spoiled. status of the bobbin by tapping the bobbin body. If the inside of the can deteriorates, gas will be produced and the knocking sound will be hollow.
Cai Minlang pointed out that after opening the box, you can observe whether the fruits and soups in the box may have abnormal discoloration or precipitation.If any abnormalities are found, it is not recommended to eat them.
The Food and Drug Administration reminds that if the can is struck, the integrity of the internal coating of the can may be damaged, causing corrosion and other damage to the can if the can is accidentally bumped and dented. after purchase, it is also recommended to dent it as quickly as possible. Do not continue to store it after consumption. Additionally, although canned food has a relatively long shelf life, it is definitely not a "ten thousand year old food." It's best to eat it as soon as possible after purchasing to avoid accidentally letting it expire.
Tinplate has a total of 9 layers of material to protect food ingredients.
The Food and Drug Administration has emphasized that canned foods refer to packaged foodsed in airtight and commercially sterilized containers. before or after packaging. Products that can be stored at room temperature for long periods. Common packaging materials include tinplate, aluminum cans, glass, sterilization bags, aluminum foil bags and plastic bottles.
Tinplate is a layered material made of mild steel plates. The tin is plated on both sides by electroplating or hot dipping, and the upper and lower parts are the tin-iron alloy. Layer, tin layer, oxide film and oil film, totaling 9 layers, can be widely used in various food packaging materials.
Among the 9 layers of material, the tin layer is the main protective layer, which can insulate food and prevent corrosion of the iron layer. It can also block environmental factors and preventdeterioration of internal foods. Tin also has a reducing effect. Most tin cans are painted on the inside to prevent removal of the tin. A few light-colored fruit and juice cans use plastic cans, because the reducing effect of a small amount of tin has a good effect on flavor and color. fruit and light-colored juices. Save the effect.
In addition, the reducing effect of tin helps resist oxidation and prevents discoloration of the pulp. Don't buy cans that appear dented, bulging, or rusty because the material has been damaged.
According to the “Hygienic Standards for Contaminants and Toxins in Food” of the Ministry of Health and Welfare, the maximum tin content for edible oils and fats in cans metal is 250 mg/kg, for drinks in metal cans. it is 150 mg/kg, and pFor metal cans, infant foods are 50 mg/kg, and other canned foods in metal cans are 250 mg/kg.
The Food and Drug Administration has established a testing method for the heavy metal tin in metal canned foods. In 2018, commercially available metal canned foods were randomly tested. The test results showed that the tin content did not exceed. the legal limit, and the public can eat it with confidence.
Canned fruits seasoned with sugar are sweeter, and diabetic patients should not drink sugar water.
The Ghost Festival is approaching soon and many people will buy canned food. Zhang Lijuan, a nutritionist at Tainan Municipal Hospital, said that when manufacturers produce cans, they will follow a sterilization process to killbacteria inside the cans and achieve a preservative effect. Therefore, choosing canned foods to sacrifice during the Ghost Festival can prevent food from spoiling in the environment and in the sun, and it will also make you feel more comfortable when eating it.
Zhang Lijuan reminded that because the quality of fresh fruits is unstable, some may be sweeter and some more sour. When checking quality, food manufacturers will use salt, sugar, and other seasonings to prepare the entire batch. canned foods have a consistent taste. In addition, they may also conform to the labels on the outer package, such as calorie or carbohydrate content, so the canned fruits taste sweeter and richer than regular fruits, but the nutrients such that vitamin C is mainly lost due toabout that. the sterilization process.
Zhang Lijuan also said that in general, ordinary healthy people are recommended to eat about 1 fist-sized fruit every day. For people with diabetes, the best amount of fruit in a single day is .Do not exceed half a fist, and the sweetness of the fruit should also be considered. If it is canned fruit, it is best for diabetics to avoid it. If you encounter Pudu at home, the consumption should be less than half a fist. fist, and you should not drink canned sugar water. Generally, healthy people should read the outer package label, convert the appropriate amount of food based on the calories listed, and be careful not to exceed the daily calorie intake.