Grapefruit has a high nutritional value, and is rich in protein, organic acids, vitamins and essential elements such as calcium, phosphorus, magnesium and sodium, which is incomparable to other fruits. Every 100g grapefruit contains 0.7g of protein, 0.6g of fat and 57kcal of calories. Grapefruit not only has high nutritional value, but also has the effects of invigorating stomach, moistening lung, enriching blood, clearing bowel and relaxing bowels, which can promote wound healing and has a good auxiliary effect on septicemia. In addition, grapefruit contains glucocorticoids, a physiologically active substance, so it can reduce blood viscosity and reduce thrombosis, so it also has a good preventive effect on cerebrovascular diseases, such as cerebral thrombosis and stroke. Fresh pomelo meat is an ideal food for diabetic patients because it contains insulin-like components. Motherland medicine also believes that grapefruit is sweet and sour, cold in nature, and has the effects of regulating qi and resolving phlegm, moistening lung and clearing intestine, enriching blood and strengthening spleen, which can cure anorexia, light mouth and indigestion, help digestion, resolve phlegm and quench thirst, regulate qi and disperse stagnation. People who often catch a cold, cough and have sensitive trachea can use a fresh grapefruit to keep the skin and remove the core, add one or two (50g) of Zhengbei apricot, Fritillaria and unbleached tremella (or yellow ear) for one day, and add a few bottles of honey (preferably honey that can moisten the lungs and relieve cough). Moreover, the skin of grapefruit is generally rich, and we often throw away the skin when eating grapefruit.