Eating canned food all your life, ensuring nutrition and not getting sick?

Original title: Eating canned food all your life can guarantee nutrition and not getting sick?
"apocalyptic canned" can really eat a lifetime? Surprisingly, the answer may be no.
In the new outbreak of coronary pneumonia, Costco, the second-largest U.S. retailer, recently launched a "doomsday" canned kit that includes dried fruits and vegetables, meat and milk in hundreds of cans enough for a family of four stuals for a year, and it's okay to stock up, and they have a shelf life of up to 30 years.
" theory, cans can be kept permanently as long as the packaging is not broken. Food safety expert, Dr. Zhong Kai, said that the shelf life depends on the physical and chemical nature of food and preservation conditions, isolating the air, completely inactivated cans can be preserved for a long time, 30 years shelf life is "not surprising."
zhang Baoshan, an expert in deep processing of fruits and vegetables and a professor at Shaanxi Normal University, believes that canned food, if not considered in terms of quality, has no shelf life in itself, but in the long storage process, the taste, color and quality of canned food will change, and the nutritional content will decrease.
launched the canned kit, Costco's official website explains that sometimes it's safer to stock up on food at home for a year in the face of natural disasters. Some netizens call it "peace of mind in a can".
" almost all food can be made into canned, not only glass-packed fruit cans, horse-mouthed iron canned meat can be called cans, supermarket paper packaging, plastic packaging of sealed food can be called cans. Zhang Baoshan said that cans are the general term for a type of food that is sterilized, sealed in an airtight container and can be preserved for a long time.
of food super-long "standby" is hidden in the process and principle of canning. Canned food is preserved by sealing first and then thoroughly heating it, according to science writer Yun Unwying. After a long period of high temperature heating, the bacteria killed light. Because it is sealed, bacteria in the environment cannot enter. Without "seeds", no matter how fertile the "soil" of the food in the can, there is no possibility that bacteria will grow.
most canned labels have a shelf life of one year, two years and 18 months. "The shelf life is not only safe, but also includes factors such as taste and taste, which can be eaten for 10 years, but may not taste good." Zhong Kai said.
Zhang Baoshan said that as the time of canning increases, the food nutrients will gradually lose, the quality will decline. For example, canned fruit in glass bottles, the effect of light for two or three years color will become very deep; The tinned meat is not light-filled, but external collisions, changes in storage temperature, etc., can also lead to a decline in the quality of the canned meat.
" cans as long as there is no drum bag generally there is no food safety risk, sterile state is very safe. If the drum bag, there may be Clostridium difficori and other spores survive, can not be eaten. Zhong Kai reminded.
cans as a processed food, the process includes canning, exhaust, sealing, sterilization, cooling and so on. "Now the canning process is mature, standardized production, canned meat 121 degrees C high temperature sterilization, fruit canned 100 degrees C sterilization, mainly kill the can of Clostridium botulism and other spores." But when all foods are processed, the nutritional quality decreases, Zhang said. Canned fruit vitamins and other nutrients are not as good as fresh fruit.
zhang Baoshan said, long-term single eating a can is not conducive to health, if you love canned, eat canned meat today, eat canned vegetables tomorrow, eat canned fruit the day after tomorrow, occasionally drink a drink, a variety of cans with food, nutrition is balanced.
", however, if there is fresh food, canned food to eat less as well. And priority should be given to cans with a short shelf life, and attention should also be paid to canned raw materials. Zhang Baoshan reminded that the sugar water in canned fruit contains 14%-20% sugar, diabetes people try not to eat.
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