Excreting toxins: when we get constipation, we are often recommended to eat bananas, because bananas contain much fibre, vitamin A, potassium … so they have the ability to adjust the intestinal tract, soften stool, and strengthen muscles. In terms of nutrition, bananas are starchy, but according to Oriental medicine, they are sweet, clear heat and laxative, promoting intestinal peristalsis, excreting toxins and excessive materials in the body.