We all know that eating bananas is good for defecation, but we should also have an experience. If you eat a banana a day, it won't have much impact at all.
What you said about losing weight through bananas may be to use bananas to help defecate and achieve the purpose of losing weight. Once people are constipated, it is easy to get fat, especially the stomach, which is quite big. Because of poor defecation, toxins accumulate in the intestines, which will make you look potbellied.
Bananas can help us defecate. When you get rid of all the toxins in the poison, of course, your stomach disappears.
However, the defecation of bananas is not so easy. You may eat a few bananas every day, which will be effective. Moreover, bananas can only play the role of defecation when they are ripe, and those that are raw and hard can't help you.
You eat less every day and add bananas to every meal, which will reduce your daily food intake and help you defecate, so you will lose weight.