In general, insisting on eating bananas is beneficial to supplementing potassium, helping gastrointestinal peristalsis, and pleasing the mood and so on. 1. Favorable for supplementing potassium: banana is a good food for supplementing potassium, a medium-sized banana contains about 400 mg of potassium. Especially after a lot of sports exercise, the body will lose potassium with sweat, easy to appear arrhythmia, rapid heartbeat, etc. Potassium can maintain the normal contraction of the human heart muscle, coordinating the contraction and diastole of the heart muscle. 2. Help gastrointestinal peristalsis: bananas are rich in fructose and dietary fiber, these nutrients can help gastrointestinal peristalsis, suitable for constipated people to eat. 3. Happy mood: bananas contain 5-hydroxytryptamine, as well as bananas itself unique aroma, often eat, to a certain extent, is conducive to mood.