Canning food first appeared in the 18 Century, but in glasses! Thanks to the demands of long sea voyages, being away from home for many years and the increasing needs of urban populations, effective means of food preservation were necessary exercise. At the time, including methods of storage of dried, smoked, salted and pickled food, but were not sufficient to store food for long periods.
Canning is a method of preserving food in sealedClosed containers vacuum and heat treatment to allow the preservation of home food at normal temperatures. Canning is one of the safest ways to get food. To maintain peak quality, shelf life of canned food is at least two years, and vitamin levels in canned foods will remain stable during the period of validity, provided that the container is not damaged one.
Canning has no effect on protein, carbohydrates and fats. If you can not take meat, for example,An amount of protein and fat for canning, as it was before. In general, the canning industry seem to have much influence on the nutritional value of food a lot. From this point of view, we should not turn to feel sorry for a quick and convenient. Your vegetables can more vitamins lying in storage rack for a week to lose. Canning is a useful method to get vitamins, as concentrations of some vitamins may decrease by 50% within the first 7 days of purchaseHarvest when stored at room temperature.
Canned needs can be heated only by serving first, because it is already cooked. Keeping the sauce of canned meat greatly missed bit 'of their nutritional value. poultry and canned fish, both protein foods, are comparable with their counterparts in nutritional value of freshly cooked. Protein is not lost during the canning process. And some varieties of canned fish tend to have higher levels of calcium astheir freshly cooked counterparts.
many fruits and vegetables are rich in vitamin A, canned are similar amounts of vitamin A to their fresh or frozen counterparts. Conserve stores of vitamin C for a maximum of two years because the can is completely closed and the food is cooked and a vacuum. canned pineapple, asparagus, and grapefruits are important sources of vitamin C.
There is a huge variety of box, which differ bothdepending on the type of ingredients and processing method. Eventually, it can be said clearly that it is better to go for the canned food of poor quality.
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