Canned fruit generally has no preservatives.

Most canned goods on the market have no added preservatives, and only a small number of canned goods may have a small amount of preservatives added due to process or raw material limitations. Fresh fruits go bad because of contamination by harmful microorganisms, while canned fruits are fresh fruits sealed and preserved after high-temperature sterilization treatment, potentially pathogenic microorganisms as well as spoilage microorganisms are killed, and external microorganisms can't get in, so they can be preserved for a long time without preservatives.

The long shelf life of canned food is mainly determined by its production process. Generally speaking, the production of canned food goes through raw material pretreatment → canning → exhaustion, sealing → sterilization, cooling → heat preservation and inspection → packaging.

Selection of canned notes

1, look at the packaging, mainly to see whether the label is standardized and complete, the date of production and shelf life, whether the existence of the shelf life, whether in the shelf life, the date of production of whether the steel seal, there is a genuine, otherwise it may be impostor Oh.

2, secondly, look at the metal lid of the canned goods whether there is rust, because the canned goods if deterioration will react with the metal lid and lead to its rust. So be careful when buying canned goods with visible rust spots on the metal lid.

3, again, look at the contents of canned goods how, if it is placed in a glass container, you can visualize the fruit block shape is intact, the contents have no foreign matter and turbidity or not. Genuine canned goods should be uniform in size and consistency, bright color, sugar water is bright and beautiful.

4, finally, the amount of air inside the canned fruit is small, the top of the can is concave under atmospheric pressure. If the top of the can is protruding, it means that the food in the can has deteriorated, and is not suitable for shopping or eating.