Recently, the "banana slimming craze" started in Japan and South Korea was introduced to China, and many dieters followed suit. In this regard, Professor Liu Fengbin, director of the Department of Gastroenterology, the First Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, pointed out that although bananas are rich in nutrition, they contain incomplete vitamins and minerals. If bananas are the staple food for long-term weight loss, it will easily lead to nutritional imbalance, even anemia or other diseases. Disadvantages: Eating bananas to lose weight is still "painful" for the spleen and stomach. "Eating bananas with boiling water in the morning and eating them as usual at lunch and dinner will make you thinner", which is said to be the latest popular morning morning banana diet in Japan. It is reported that Japanese fat actress Sammi experienced morning banana diet in the morning and lost seven kilograms in one and a half months, which immediately caused a sensation. According to people who believe in this diet, bananas are not high in calories. It is said that a banana 100g contains only 87 calories, while a bowl of white rice 100g contains about 150 calories. Therefore, eating bananas as the staple food is low in calories. And eating a few bananas and boiling water for breakfast can make the stomach feel full. After lunch at noon, eating two bananas can enrich the enzymes in the stomach and make digestion faster, so that the usual lunch and dinner will not accumulate fat in the gastrointestinal tract. In this regard, Liu Jiaoshou believes that it is not advisable to advocate drinking enough bananas and water. "In a sense, this feeling of fullness and unwillingness to eat is a morbid state, and the gastrointestinal tract will not feel comfortable." He pointed out that some people think that bananas don't contain much calories, which depends on the intake. If you only eat one or two a day, it's not a big problem. However, if you eat five or six a day, regardless of the calorie problem, many people with spleen and stomach weakness or digestive dysfunction may not be able to stand it for a long time. "We usually have a thick tongue coating after eating bananas because it is cold and wet." Liu Jiaoshou pointed out that, therefore, people who want to try this kind of "morning morning banana diet" should weigh their stomachs in advance, so as not to make their stomachs suffer. In addition, eating bananas on an empty stomach for a long time is not only bad for gastric acid secretion, but also leads to anemia because of too simple nutrient intake. For people with acute and chronic nephritis and renal insufficiency, this method of losing weight is even more taboo. Because bananas contain more potassium salt, if eaten in excess, it will increase the burden of renal function, delay the improvement of the disease, and may also lead to the deterioration of the disease. In addition, bananas are rich in starch and sugar, so diabetics should also pay attention to their intake to avoid diseases caused by abnormal blood sugar. Pro: Eating bananas properly can prevent many diseases. "It is undeniable that bananas are very nutritious. In addition to starch, protein, sugar, pectin and vitamins, it also contains many minerals such as calcium, phosphorus and iron. " Liu Jiaoshou pointed out that eating bananas properly every day can prevent the following diseases: it can treat constipation: eating one or two bananas can help relieve constipation. Because bananas are rich in pectin, they can help regulate gastrointestinal function, promote digestion and have a laxative effect. Help lower blood pressure: Potassium contained in bananas has an inhibitory effect on sodium in the body. Hypertensive patients can eat one or two tablets every day according to their own physique, which helps to lower blood pressure. Relieve depression: Bananas have a certain curative effect on insomnia or bad mood, which is recognized by the medical community. It is said that bananas contain a substance called "serotonin", which can soothe the nerves. Therefore, depressed patients, doctors sometimes advise them to eat bananas properly.