Liu Xi, a scholar at the end of Han Dynasty, wrote in Ming Jie: "It is made of preserved fruit and oil. There are people called Pingpo. " Wang, a scholar in the Ming Dynasty, wrote the book "Qunfangpu": "Apples come from the north, the best. Green, cooked, half red, half white or full red. " With the title of "Apple".
Traditional medicine believes that apples are sweet and cool, and have the effects of promoting fluid production, moistening the lungs, strengthening the spleen, benefiting the stomach and nourishing the heart. So apples have always been a popular fruit. But the further understanding of apples, especially their nutritional value, depends on the analysis and research of modern science. It is known that apples contain protein, fat, carbohydrate, vitamin A, vitamin B 1, vitamin B2, vitamin C, carotene, calcium, magnesium, phosphorus, iron, zinc, potassium, selenium, malic acid, citric acid, tartaric acid, tannic acid, nicotinic acid, pectin and cellulose. What are the benefits of these nutrients to the human body? In recent years, it has gradually gained recognition.
The content of zinc in apples is very high. Zinc is a component of many important enzymes in human body and an important element to promote children's growth and development. It is good for children to eat some apples often. Zinc is also an indispensable element for nucleic acids and protein. Eating more apples can promote brain development and enhance intelligence and memory.
India
Indian medical scientists have found that the selenium content in the normal retina of human eyes is 7 micrograms, while the selenium content in the retina of eagle eyes is 100 times that of human beings, indicating that eagle's keen vision is related to high selenium content. Some people can't see clearly at dusk because the lack of vitamin A reduces the synthesis of rhodopsin. Apples contain vitamin A and trace element selenium. Eating some apples often can protect your eyesight.
France
French medical scientists have found that malic acid can lower cholesterol. Malic acid can combine with intestinal cholic acid, which hinders the reabsorption of intestinal cholic acid, thus promoting the conversion of cholesterol in blood into cholic acid and lowering cholesterol. In addition, pectin, vitamin C and cellulose contained in apples can also lower cholesterol. Eating 300 grams of apples a day can gradually reduce the originally high cholesterol. Apples are rich in potassium salts. After sodium salt enters human blood, it can be substituted and excreted, which is beneficial to reduce hypertension and protect arteriosclerosis, coronary heart disease and cerebrovascular disease.
Apple juice, once 100g, three times a day for several days, is a prescription for treating hypertension. Soluble fiber in apples can regulate blood sugar, which is also good for diabetics. Apple is also rich in vitamin C and iron, which is undoubtedly a good food for anemia patients. Slice the apple, add black tea and rock sugar, brew with boiling water and drink, which is the health apple tea.
United States of America
Reader's Digest magazine in the United States once introduced 10 kinds of the most healthful fruits, among which apples ranked first. The article says that apples are rich in fiber, which can supplement enough fiber, reduce the incidence of heart disease and lose weight. Many Americans regard fruit as a necessity to lose weight and go on a diet one day a week. On this day, they only eat apples. This day is called "Apple Day".
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