1. Protect cardiovascular and cerebrovascular diseases
It contains flavonoids, which can lower blood pressure to a certain extent and is also an antioxidant. It can eliminate the "aging devil" in the human body-free radicals, and also promote the concentration of high-density lipoprotein in the blood. This lipoprotein can protect the arterial environment of human body, thus protecting arterial function. Therefore, eating grape skin has a certain protective effect on cardiovascular and cerebrovascular diseases.
2. Anti-inflammatory, anti-bacterial and anti-radiation
Grape skin is rich in resveratrol, which is an antitoxin produced by grapes to resist the invasion of external mold. It has good natural antioxidant effect, and can resist radiation, diminish inflammation and inhibit bacteria! Therefore, office workers who face computer radiation every day may wish to eat more grapes with skins to satisfy their appetite and protect their health!
Step 3 prevent aging
The skin of purple grapes contains a lot of anthocyanins, which is familiar to many young women. It is the most effective antioxidant in medical research, so it is also called "anti-aging artifact", and its anti-oxidation and anti-aging ability is 50 times that of vitamin E! Therefore, eating purple grapes with skin can effectively prevent aging!
Nutritional value of grapes;
Every100g grape contains10.3g carbohydrate and 0.5g protein, and also contains various vitamins and organic acids. The total acid content in grapes is 0.3-2. 1%, including malic acid, oxalic acid and tartaric acid. Tartaric acid is a carboxylic acid, which exists in many plants and is also one of the main organic acids in wine. Organic acids in grapes can stimulate appetite, promote digestion, chelate reduction and promote the absorption of various minerals.
Different colors have different effects and functions on grape skins.
1. Black grape skin: nourishing yin and tonifying kidney, and the hair is black and shiny.
2. Red grape skin: soften blood vessels, promote blood circulation and remove blood stasis, and prevent thrombosis. Patients with cardiovascular diseases may want to eat more.
3. Green grape skin: Emphasis on clearing away heat and toxic materials. White grape: It has the functions of invigorating lung qi and moistening lung, and is suitable for people suffering from respiratory diseases such as cough.
Is it really good to eat grapes without spitting their skins?
Eating grapes without spitting grape skins, even swallowing grape seeds can only lead to tongue numbness, and it feels very uncomfortable. This is because it contains a lot of tannins, which will make the protein on the surface of the tongue, mouth and esophagus coagulate and produce a strong astringent taste. To a certain extent, this substance, like tannin in persimmon, is harmful to the digestive tract when eaten in large quantities, and the effective components in grape skin still pass through the intestine and are not easily absorbed by people.
This is because resveratrol and polymerized procyanidins contained in grape skins are difficult to dissolve in water. Resveratrol is soluble in ether, chloroform, methanol, ethanol, acetone, etc. Polymeric proanthocyanidins in grape seeds are easily soluble in methanol, acetone, ethanol and ethyl acetate. Therefore, people often use a mixture of ethanol and water to extract these components.