With the enhancement of modern people's awareness of health preservation and healthy eating, preservatives have become drugs in food. When people buy food in supermarkets, they have reached the point of "talking about the color change of preservatives". But do you know that preservatives are actually essential additives in many foods and essential ingredients for food preservation? Normal doses of preservatives will not cause any harm to the human body at all.
Preservatives are terrible, and it is even more terrible without preservatives: within the scope of safe use, preservatives are harmless to the human body, and their side effects are even worse than sodium. China has approved 32 kinds of food preservatives that can be used, such as potassium sorbate, which are extremely antiseptic and have little toxicity. It is also contained in the human body and can participate in the normal metabolism of the human body.
Food without preservatives is easy to deteriorate, which can easily lead to the proliferation of bacteria in the human body, thus causing food poisoning, various gastrointestinal diseases and even death. Therefore, preservatives in a safe range are essential elements in many foods, which help people to inhibit the growth of bacteria in food.
What kind of food can be preserved for a long time without preservatives?
According to Dr. Fan, all foods that contain no preservatives and can be preserved for a long time are especially sweet, salty, sour, dry and oily. For example, there is no need to add preservatives to canned food. It already contains a lot of sugar or salt, replacing the role of preservatives.
The same is true of instant noodles that we often eat. After frying and drying, the moisture content of noodles was reduced, which played an antiseptic role. Generally speaking, foods with less water are unlikely to go bad. They are all bread, some have a shelf life of only 3 days, and some can reach 6 months, which is related to water content. Foods such as egg yolk pie, in addition to low water content and high oil content, will also spray a layer of alcohol on the surface of the food, which also plays an antiseptic role. In addition, some vacuum packaging and aseptic packaging can also play a good anti-corrosion role while isolating air.