Watermelon can be called "the king of summer", refreshing and thirst-quenching, taste sweet and juicy, is a good fruit in midsummer, watermelon contains a lot of glucose, malic acid, fructose, protein amino acids, tomato and vitamin C, etc. except fat and cholesterol. Substances are rich, nutritious, pure and safe foods. The sugar content of quail meat is generally 5-12%, including glucose, fructose and sucrose. Sweetness increases with the increase of sucrose at the late mature stage. Gastrointestinal defiant Watermelon cold, eat more easily hurt the stomach. Li Shizhen recorded in "Compendium of Materia Medica" that watermelons and melons are all cold, and secular thoughts are that they should be priming, nectar and heart should be taken. Therefore, people with stomach-deficiency should pay attention to eating watermelon. Since watermelon is a "cold food," if the body is too weak to consume too much watermelon, it will cause bloating, diarrhea, and dampness. A large amount of moisture in the watermelon will also dilute the gastric juice, causing indigestion. Therefore, these people should not eat watermelon. 2. Cold person Do not eat watermelon at the beginning of a cold, otherwise it will make the cold worse or extend the healing time. Whether it is a cold or a hot or cold, it is an epidemic at the initial stage. It should be treated with a divergent approach that allows the evil to resolve from the table. The Chinese doctor believes that the table cannot be attacked or attacked, otherwise it will cause the evil to enter and get worse. In the early stages of a cold, illnesses and evils are on the table. Eating watermelon is equivalent to taking clear and hot medicines, which will lead to evil and increase the time for colds to heal or extend. However, when the flu increases, fever, thirst, sore throat, urine, yellow fever and other fevers occur, you can eat some watermelons at the same time as you normally use the medicine, which will help you recover from a cold. Eating too much watermelon may make the cold worse, leading to deterioration of the disease. The watermelon has the effect of clearing away heat. At this time, eating watermelon will make the cold worse or extend the duration of the disease. Colds are often due to poor immunity and poor health because after colds are recovered, attention should be paid to enhancing the body's immune system and eating tonics such as fu card and donkey-hide gelatin. Clinical studies have shown that Ejiao can promote the proliferation of T cells in people with low immune function. Th1/Th2 is in balance and enhances immunity. 3. People with weak physique, tiredness and cold Watermelon tastes cold, the above people are cold and yang weak, and eating more will “cold on the coldâ€. 4. People with renal insufficiency In patients with renal insufficiency, the function of excreting water in the body is greatly reduced, so edema of the lower extremities or the body often occurs. If these patients eat too many watermelons, they will consume too much water, and they will not be able to discharge excess water in time, resulting in excess storage of water in the body and an increase in blood volume. This will not only make the edema worse, but also cause acute heart problems. Failure. Therefore, patients with renal insufficiency should eat less or not eat watermelon. 5. Oral ulcers Chinese medicine believes that the main cause of oral ulcers is yin deficiency heat, virtual fire disturbance, burns blood and veins. Watermelon has a diuretic effect. If the oral ulcers eat more watermelon, normal water needed by the body will be discharged through the diuretic effect of watermelon, which will aggravate the state of emptiness. Yin deficiency is internal heat and prosperous, aggravate oral ulcers. 6. Diabetic people Watermelon is about 5% sugar, and is mainly glucose, sucrose and some fructose, which means that eating watermelon will cause increased blood sugar. Because normal people will promptly secrete insulin, blood sugar, urine sugar can be maintained at normal levels. Diabetic people, on the other hand, eat too many watermelons in a short period of time. Not only do blood sugar levels increase, but serious illnesses can also lead to acidosis due to metabolic disturbances and even life-threatening. The amount of carbohydrates (sugars) that people with diabetes eat each day need to be strictly controlled, so if you eat watermelon several times a day, you should reduce the number of meals and pastas (carbohydrates) accordingly to avoid aggravating the condition. If you eat 25-50 grams of watermelon at a time, it has little effect on people with diabetes, so diabetics should pay attention to the amount when they eat watermelon. 7. Older people Because older people are older, most people's spleen and stomach function and heart and kidney function will be weakened. Eating too much watermelon in the summer will damage the spleen and stomach. 8. Pregnant women and mothers should eat less watermelon Relatively insufficient insulin in pregnant women, the stability of the role of blood sugar decreased, if the watermelon eat too much, intake of excessive sugar, can cause high concentrations of sugar in the blood, unfavorable to health. In addition, maternal after just finished production, the body is relatively weak, cold watermelon, Chinese medicine believes that eating more watermelon will damage the spleen due to too cold. 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