Apple, called Taopo in ancient times, is sweet, sour and nutritious, and is one of the fruits suitable for all ages. Its nutritional value and medical value are very high, and it is called "the first medicine for doctors" by more and more people. Many Americans think that apples are a necessity to lose weight. They go on a diet one day a week and eat apples on this day, which is called "Apple Day". Apples are very suitable for babies, the elderly and the sick. Apples are rich in nutrition. Chewing slowly when eating apples is not only conducive to digestion, but also conducive to reducing human diseases. Don't eat fruit before meals, so as not to affect normal eating and digestion. Apple (average) nutrient composition table (per 100g) water (g) 85.8 energy (kcal) 52 protein (g) 0.2 fat (g) 0.2 carbohydrate (g) 13.5 dietary fiber (g) 1.2 cholesterol. 20 vitamin C (mg) 4 vitamin E (mg) 2. 12 calcium (mg) 4 phosphorus (mg) 12 potassium (mg)19 sodium (mg)10.6 magnesium (mg) 4 isoleucine 9 leucine 12 lysine 10 sulfur-containing amino acids 1 kloc-0/phenylalanine1glutamic acid 20 glycine 100 1 alanine 9 apples are rich in carbohydrates, vitamins and trace elements. Especially the content of vitamin A and carotene is higher. The influence on disease and health is rich in water-soluble dietary fiber-pectin. Pectin has the functions of protecting intestinal wall, activating beneficial bacteria in intestinal tract, regulating gastrointestinal function, absorbing water, eliminating constipation, stabilizing blood sugar, beautifying skin, adsorbing bile and cholesterol, and can effectively prevent hyperlipidemia, hypertension and hyperglycemia, clean intestinal tract and prevent colorectal cancer. Malic acid and citric acid in apple sour taste can improve gastric juice secretion and promote digestion. Malic acid can also stabilize blood sugar and prevent diabetes, so diabetics should eat sour apples. Apples are rich in potassium, which can prevent and treat hypertension. China people's salt intake is seriously excessive, which leads to the retention of sodium and water in the body and promotes hypertension. Potassium can increase the excretion of sodium from the kidney and reduce the content of sodium in cells, thus lowering blood pressure. Potassium can also dilate blood vessels, and together with pectin can prevent metabolic syndrome. Apples can also prevent cancer and lead poisoning. Apple juice has a strong effect on killing infectious viruses. People who eat more apples are much less likely to catch a cold than those who don't eat or eat less apples. Therefore, some scientists and doctors call apples "all-round healthy fruits" or "general practitioners". Now the air pollution is more serious. Eating more apples can improve the respiratory system and lung function, and protect the lungs from pollution and smoke. Apple has a natural and pleasant aroma, which has obvious effect of eliminating depression. Traditional Chinese medicine believes that apples are flat in nature and have the effects of nourishing the heart and moistening the lungs, promoting fluid production and detoxifying, benefiting qi and regulating the stomach, sobering up and calming the liver. Eating should avoid apples and seafood. Apples contain tannic acid. Eating with seafood not only reduces the nutritional value of seafood protein, but also tends to have symptoms such as abdominal pain, nausea and vomiting. Similarly, other fruits with more tannins, such as strawberries, bayberries, persimmons, pomegranates, lemons, grapes and sour pomelo, should not be eaten with seafood. Apples are rich in nutrition. Chewing slowly when eating apples is not only conducive to digestion, but also conducive to reducing human diseases.