When buying grapes and other fruits, people will find that there is a white "frost" on the skin of the fruit. Many people worry that this is not a dirty thing. There is also the legend that this is a pesticide residue. What is the white frost on grapes and grapes? When you buy fruit, you will see a layer of white frost on the surface of the grapes. If you look closely at plums, plums, and blueberries, you will feel greasy when washing apples. These are actually fruit powders—sugar alcohol substances secreted by the fruit. Water is harmless to human health. And the grape's hoarfrost contains oleanolic acid, which has certain benefits for protecting the liver and does not need to be washed off. The white substance on the skin of fresh grapes is a fruit powder, which is a waxy layer that prevents evaporation of water, reduces the intrusion of microorganisms, and protects the freshness of the fruit. Different grape varieties, fruit powder thickness is not the same. Can help distinguish different grape varieties. Fresh grapes have fruit powder that is thin and frosty and falls off when touched. Rubbing, cleaning, long-term storage will make it disappear. The fruit powder remains intact, indicating that the grapes have just been picked and are very fresh. Eating fruit powder will not affect health. However, if the skin has white or light blue spots, it is a residue of the drug and it needs to be cleaned and eaten. There is yeast in the grapefruit powder. When the homemade wine is fermented, there is no need to add yeast. How to remove the hoarfrost on the skin 1 The raisin bought first to find a big pot to install, wait a minute 2 We use scissors to cut the grapes to the basin 3 Remember to cut near the innermost, but don't hurt the skin, and don't set aside, or wait to poke 4 The kiwis are cut one by one and soaked in salt water for about fifteen minutes. 5 Then prepare a clean towel and put it in another basin with clean water. Take some of the grapes and put it on the towel. 6 Lift up the four corners of the towel. Just like the usual sieve, sift the raisins. The kiwi rubs against the towel. The dirt on the surface is almost washed away with the white frost. Look at the towels after washing and you will know how dirty the grapes are. 7 Wash it with a towel and then rinse it with water. Is the hoarfrost on the fruit harmful to the human body? The hoarfrost on the grapes is harmless to the human body. This layer of fruit powder has a protective effect on fruits. For example, the layer of fruit powder on the surface of grapes can reduce the evaporation of water, thus preventing rapid water loss and shrinkage after fruit picking, and has a positive effect on adapting to arid environment. The insoluble nature of the fruit powder prevents the formation of a moist environment on the surface of the grapes, thus reducing the infestation of pathogenic bacteria. The white frost on the grape's surface also contains yeast, so the homemade wine can be fermented without additional yeast. It should be explained that grapes are fruits that are not susceptible to insects, and most of them are now bagged. The probability of using high-concentration pesticides is very small. Therefore, if it is determined that the grape itself has white frost, it is not necessary to wash it off. So, how do you distinguish the whitening cream and the normal white cream on the grapes when you buy them? To some extent, taking white frost is a sign of fresh grapes, but some businesses cannot avoid spraying low-concentration bactericidal pesticides. The specific method of differentiation is that the normal “white frost†is distributed naturally and does not cover the color of the grape skin itself, so that the grape will look more beautiful. If the drug is "white frost," the appearance is unevenly distributed, and there will be dark blue marks. Foot Spa Massager,Bath Foot Massager Machine,Foot Spa Bath,Bath Foot Massager With Bubble Huaian Mimir Electric Appliance Co., LTD , https://www.mimirfootbath.com