Bread is out of date and cannot be eaten. After expiration, its dry mouth will become more severe and the surface of bread will become hard. Secondly, the fat content in bread may be oxidized, and the vitamin content will be reduced, resulting in a decline in its nutritional value. Once the surface of bread is moldy, poisoning symptoms may appear after eating.
Expired food went bad and produced a lot of bacteria. No matter where you are, don't eat casually. Eating it is easy to cause gastrointestinal diseases. Of course, it does not rule out that some people are in good health and it is no problem to eat one.
No matter the taste or safety, the food within the shelf life is of course the best, but the expired food can also be eaten on the premise that the food storage conditions meet the standards, the packaging is intact, and the color and flavor have not changed.
For example, if the expired bread is not moldy and hard, and the color, taste and taste are normal, it can be safely eaten; Similarly, jam and honey will not be moldy and have no smell of alcohol. They look, smell and feel normal, and they don't have to be thrown into the trash can. However, because manufacturers will not guarantee the safety of expired food, consumers are advised to eat expired food carefully.
There are many ways to extend the shelf life of food, and it is not necessary to add a lot of preservatives. Some foods don't need preservatives at all during production and processing.
For example, after the instant noodles are fried and dried, the water available to corrupt microorganisms no longer exists, and it will not deteriorate even without preservatives; Canned food is sterilized and sealed immediately after disinfection. All the bacteria in the can have been killed, so no preservative is needed. In other words, foods with low water content and high temperature sterilization often do not contain preservatives.
Candy, honey and solid drinks with high sugar content are all foods with long shelf life, because microorganisms are too dry to reproduce.