Black raisins belong to natural seedless grapes. In order to increase the fruit size, gibberellin is generally used. The granular papules on the fruit surface are caused by high concentration of gibberellin, also known as "fruit thorns". The gibberellin treatment period is in full swing, and there are still forty or fifty days before the grape picking period. Eating gibberellin will not be harmful to human body.
What is the frost on the grape skin? The frost on the grape skin is harmless to human body. These creams are sugar alcohols secreted by grapes, also called fruit powder.
These frosts have a protective effect on grapes. They can reduce water evaporation and avoid rapid dehydration and shrinkage of grapes after picking. This layer of frost is insoluble in water, which can avoid the formation of a humid environment on the grape skin, thus reducing bacterial infection.
What are the benefits of eating grape skins? 1. Protecting eyesight Anthocyanin is a phytochemical component contained in most purple objects. It is a strong antioxidant, which can not only effectively remove free radicals and delay aging, but also enhance immunity, inhibit inflammation, prevent allergies, prevent eye fatigue and enhance vision.
2. The reason why the anti-cancer grape skin has astringency is because it contains a good phytochemical tannin, which is also an antioxidant, which can resist tumors and play an anti-cancer role.
3. Preventing cardiovascular and cerebrovascular diseases Resveratrol is a polyphenol compound. In addition to grapes, peanuts, mulberries and other foods also contain this element. It has strong biological activity and is a plant antitoxin lower than mold invasion. This substance can not only make people energetic, but also prevent cardiovascular and cerebrovascular diseases and fight cancer.
4, anti-hyperglycemia grape skins always contain natural pigments, which can actively promote the decomposition of sugar in the human body, effectively resist hyperglycemia, and avoid indigestion caused by eating too many grapes.
5. Resveratrol contained in grape skin can effectively reduce low-density lipoprotein cholesterol in serum, increase high-density lipoprotein cholesterol, protect tiny blood vessels, prevent heart and liver damage, enhance immune system activity, and resist inflammation and bacteria.
6. Anthocyanin contained in anti-tumor grape skin is the most efficient antioxidant in plant sources, which can inhibit spontaneous gene mutation and lipid peroxidation caused by radiation, regulate the immune function of the body and play an anti-tumor role.