Banana stem is a natural diuretic and helps detoxify the body. It is also considered a natural remedy for supporting treatment of kidney stones. Adding banana stem can help you stay healthy and keep your kidneys up and running.It also helps prevent high blood pressure, and maintain fluid balance within the body. Banana stem is said to be a diuretic and helps detoxify the body. It is used prevent and treat kidney stones. Banana stem juice is beneficial to health,As banana stem juice is low in calories, you can take plenty of it without consuming excess calories. The recommended daily amount of fiber is 25 grams, but if you consume 20 to 40 grams of fiber a day, you will be able to lose weight more easily.