Eating bananas an hour or so after a meal can better achieve the effect of laxative, because after food enters the human digestive system, the digestive tract needs to decompose and absorb the nutrients in food, and the whole process takes about 0.5-4 hours. Bananas are rich in soluble dietary fiber, so eating them one hour after meals can better enhance the gastrointestinal power and peristaltic frequency, and promote the efficiency of its decomposition and absorption. In addition, bananas also have a laxative effect, and eating them after meals can speed up the entry of excrement into the rectum, colon and other lower digestive system tissues, preventing the occurrence of constipation. It should be noted that the consumption of bananas immediately after meals will not only increase the burden on the stomach and intestines, but also affect the absorption of nutrients in the intestines, while excessive consumption of bananas in an empty stomach will cause stimulation of the gastrointestinal mucosa and easily cause diarrhea symptoms.