Apple, the ancient name of crabapple, also known as the Tao Po, sweet and sour, nutritious, is one of the fruits of the old and young [2]. Its nutritional value and medical value are very high, by more and more people called "doctor first medicine". Many Americans take the apple as a slimming essential, dieting one day a week, this day to eat apples, known as "Apple Day". Vitamin C in apples is the protector of the cardiovascular system and a healthy element for heart disease patients. People who eat more apples have a much lower chance of catching a cold than those who don't eat apples or eat less apples. Therefore, some scientists and physicians call apples "all-round health fruit" or "general practitioner". Nowadays, the air pollution is more serious, eat more apples can improve the respiratory system and lung function, protect the lungs from the impact of airborne dust and soot. The gelatinous and vector element chromium in apples can keep blood sugar stable, so apples are not only a healthy snack for diabetics, but also an essential fruit for anyone who wants to control blood sugar. And it is also effective in lowering cholesterol. Apples can also prevent cancer and lead poisoning. Motherland medicine believes that apples have the effect of generating fluids to quench thirst, moistening the lungs to get rid of vexation, strengthening the spleen and stomach, nourishing the heart to benefit the qi, moistening the intestines, stopping diarrhea, relieving the summer heat, and waking up. ◇Applicable People It is very suitable for infants, young children, the elderly and the sick. Now the pace of life in the city is very tense, the pressure of the professional population is very high, many people have different degrees of tension, depression, this time pick up an apple smell, bad mood will be relieved, but also has the effect of refreshing the brain. Expectant mothers can eat an apple every day to reduce the reaction of pregnancy. ◇Applicable amount Eating 1-2 apples a day is enough to achieve the above effect. Men should eat more apples than women because apples have the effect of lowering cholesterol. ◇Special Tips Apples are rich in nutrition. Eat apples should be chewed and swallowed slowly, which is not only good for digestion, but more importantly, it is very good for reducing human diseases. Don't eat fruits before meals, so as not to affect the normal eating and digestion. ◇Health traffic light Apple is rich in sugar and potassium salts, nephritis and diabetes should not eat more.