Apples are rich in nutrition. It contains many vitamins and acids. 1 Apple contains more than 30mg of flavonoids, 15% of carbohydrates and pectin, as well as vitamins A, C, E, K and antioxidants. 1 apple (154g) dietary fiber 5g, potassium 170mg, calcium 10mg, carbohydrate 22g, phosphorus 10mg, Vc7.8g, VB 7.8g .. Apple contains much more calcium than ordinary fruits. Malic acid can metabolize calories and prevent obesity in the lower body. As for soluble fiber pectin, it can solve constipation. Pectin can also promote the excretion of lead, mercury and manganese in gastrointestinal tract, regulate the blood sugar level of human body and prevent the sudden rise and fall of blood sugar. German scientists have found that pectin in apples can lower cholesterol. After a long-term investigation, Dutch scholars found that people who eat 1 apple every day have increased bile excretion and bile acid concentration, which is helpful for the liver to excrete more cholesterol. Polyphenols and flavonoids contained in apples are natural chemical antioxidants, which can remove the metabolic "garbage" in the body in time. Eating ripe apples can cure constipation. Eating chopped raw apples can prevent mild diarrhea with pectin. Malic acid can stabilize blood sugar and prevent senile diabetes, so diabetics should eat sour apples. Apple contains sugar, lithium and bromine, which is an effective sedative and hypnotic without side effects. Apples contain zinc and magnesium, so eating apples often can enhance memory and promote children's development. Because some elements in apples can eliminate lead and mercury harmful to health, European scientists call apples anticancer drugs. Eating apples should be chewed slowly, which is not only conducive to digestion, but also conducive to oral hygiene and reduce human diseases. According to botanists' experiments, if an apple takes 15 minutes to finish, the organic acids and fruit acids in the apple can kill 99% bacteria in the mouth. So eating apples slowly is very beneficial to human health.