Preservatives can keep fruits and vegetables for more than ten weeks. What harm does this preservative do to health? Coating preservative: it can inhibit respiration, reduce moisture emission and prevent microbial invasion. Include wax film coating agent, shellac coating agent, oily film coating agent and other coating agents. Harmless to human body. Benzoic acid is a kind of food preservative that is allowed to be used in all countries in the world. It is easy to be excreted with excrement in animals, does not accumulate, has low toxicity and low price, and currently occupies most of the domestic preservative market. Appropriate chlorine dioxide preservative will not produce harmful substances in human body, will not remain in human body and will not cause any harm to human body. It can effectively control the conversion of protein amino acids into ethylene, thus inhibiting the decay and deterioration of fruits and vegetables.

Keeping fresh with baking soda can remove pesticide residues. In addition, baking soda as a preservative will not penetrate into the orange peel, so you can eat it without eating the orange peel. If you are still worried about insecurity, you can wash it with water, because baking soda is easily soluble in water. If you use regular good insurance drugs, there is no problem, because good ones are physically extracted and must be tested before they can be sold. If it doesn't meet the standard, oranges can't be sold. There may be some problems if the use is not standardized. Plus when buying apples, it may be in the season with higher temperature; 3. After buying apples that are not very fresh, put them directly in plastic bags instead of the refrigerator, and put them in a higher temperature environment at will.

Apples that can't be eaten in a short time can be put in the refrigerator, provided that the water on the surface of the apple is wiped clean, wrapped in kraft paper and put in the refrigerator, which can reduce the temperature and keep the apple for a longer time. When the temperature is low in the morning or evening, put the fresh apples directly into the vat and cover the mouth of the vat with plastic wrap at home. Then put the water tank in a cool place at home. In this way, apples can be kept for several months and taste good. Put a disposable plate at home, wrap it with plastic wrap and put it in the refrigerator. Because the storage temperature of apples is 0℃ to 3℃. The refrigerator absorbs water, and any fruit can be stored in the refrigerator for a short time, but it will taste bad after a long time.