Fruits can supplement all kinds of nutrients needed by the human body, so many people like to eat some fruits in summer. We all know that grapes are rich in nutrition, taste delicious, and can be eaten and brewed. Many people see a layer of white frost on the grape skin and are afraid of being poisonous. In fact, the white frost on grapes has no side effects on human body!
What is the white frost on grape skin? The white frost on grape skin is harmless to human body. These white frost are sugar and alcohol substances secreted by grape, also known as fruit powder. These white frost are natural synthetic substances of plants, they are insoluble in water, so they are not easy to clean. Some people say that flour can wash off the grape white frost; in fact, it only changes the structure of the white frost, or blocks the gap between the white frost crystals.
The white frost has a protective effect on grapes. They can reduce the evaporation of water and avoid the rapid shrinkage of water loss after grape picking. This layer of white cream is insoluble in water, which can avoid the formation of wet environment on grape skin, thus reducing the infection of bacteria. Grape white cream also contains yeast. So when we make our own wine, we don't need to add yeast. Yeast can also be eaten directly. Bread, bread and other foods contain yeast.
The grape itself is not easy to grow insects, but it is planted by bagging, so the grape is rarely sprayed with pesticides. However, it can not be completely ruled out that these hoarfrost are not pesticides. How to distinguish natural white frost and pesticide? Natural white frost is evenly distributed and will not cover the color of grape itself. However, the 'white frost' of pesticide residues is not evenly distributed, and there will be traces of dark blue.
Can the white frost on the grape skin be eaten. These creams are sugar and alcohol substances secreted by grapes, also known as fruit powder. So we can rest assured to eat boldly!
How to wash the white frost on the grape skin
Put the grapes in the basin, add water to the grapes and add some salt. After soaking for 20 minutes, gently scrub them with your hands. However, after cleaning, the original "white frost" on the surface of grape is not completely cleaned, but the effect of cleaning other dirt on the surface is obvious.