Effects and functions: According to Chinese medicine, pomelo taste sweet, sour, cold, have a healthy stomach and food, down the gas phlegm, light and happy color and other functions. Modern medical research has found that pomelo meat is very rich in vitamin C and insulin-like components, so there are lowering blood sugar, lowering blood lipids, weight loss, skin care and other effects. Regular consumption, hypertension, diabetes, vascular sclerosis and other diseases have auxiliary therapeutic effects, obese people have health and beauty function.　　Pomelo also has stomach, lung, blood, intestinal, diuretic effect, can promote wound healing, sepsis and other good auxiliary effect. In addition, pomelo contains physiologically active substances piroside, can reduce the viscosity of the blood, reduce the formation of blood clots, so the cerebrovascular disease, such as cerebral thrombosis, stroke, etc. also has a good preventive effect. Fresh grapefruit meat is an ideal food for diabetics because it contains insulin-like components.　　Nutritional value: Pomelo contains sugar, vitamin B1, vitamin B2, vitamin C, vitamin P, carotene, potassium, phosphorus, citric acid and so on. The main components of grapefruit peel are naringin, neohesperidin, etc. The grapefruit kernel contains fat oil, phellandrene ketone, phellandrene lactone and so on. Pomelo is rich in nutrients, per 100 grams of edible portion, containing 84.8 grams of water, 0.7 grams of protein, 0.6 grams of fat, 12.2 grams of carbohydrates, calories 57 kcal, 0.8 grams of crude fiber, calcium 41 milligrams, 43 milligrams of phosphorus, 0.9 milligrams of iron, 0.12 milligrams of carotenoids, sulphatidic acid 0.07 milligrams of riboflavin 0.02 milligrams of niacin 0.5 milligrams of ascorbic acid. 41 mg.　　Therapeutic methods: 1, the treatment of geriatric cough and asthma.　　Ingredients: grapefruit peel.　　Method: Steep in boiling water, drink instead of tea.　　2, the treatment of lung heat cough.　　Ingredients: 100 grams of pomelo, 100 grams of pear, a little honey.　　Methods: Wash and boil the above ingredients together, add honey or rock sugar to take.　　3, treatment of phlegm cough.　　Ingredients: pomelo, wine, honey.　　Method: Peel and remove the core of pomelo, cut into slices and soak in wine overnight. Boiled, mixed with honey, when swallowing.　　4、Treatment of frostbite.　　Ingredients: 50 grams of grapefruit peel.　　Methods: After decoction, use it to soak the frostbite parts, several times a day.　　5, treatment of headache.　　Ingredients: pomelo leaves and scallion white equal amount.　　Method: Pound the two together and stick them on the temples.　　6, treatment of joint pain.　　Ingredients: pomelo leaves, ginger, tung oil 20 grams each.　　Method: Pound them together and put them on the painful place.　　7, cure indigestion.　　Ingredients: 15 grams of pomelo peel, 10 grams each of chicken gold, hawthorn, 5 grams of sand nuts.　　Method: Decoction with water.　　8, cure acute mastitis.　　Ingredients: 200 grams of pomelo pulp, 50 grams of green peels, 30g of dandelion. Method: Decoction with water.