The reason why eating bananas makes you feel better: 1, because bananas are rich in 5-hydroxytryptamine, and 5-hydroxytryptamine has a very obvious effect on the regulation of the nervous system, so eating bananas properly to supplement 5-hydroxytryptamine can increase the sense of pleasure and make your mood better. 2, bananas are rich in dietary fiber, and dietary fiber can adjust the number of intestinal flora after entering the intestine, which is important for maintaining the balance of the intestinal microecology. The balance of the intestinal micro-ecology has an important role. There is an important brain-gut axis between the intestinal micro-ecology and the brain, so by eating bananas to supplement dietary fiber to adjust the intestinal micro-ecology, the brain-gut axis can also make the mood better.