Is it bad to eat 3 bananas a day?

Not necessarily: A banana contains 422 mg of potassium in an average chiquita banana. Unless you have too much or too little potassium, having 3 bananas would not be harmful unless there is an allergy to bananas. There are approximately 30 grams of carbohydrates in a banana. Eating a banana will raise your energy level by 20 percent for two hours straight, according to tufts university researchers.

Depends: Bananas do have a high glycemic index meaning they are very sugary. Half a banana is one serving size. As long as your weight is within normal limits it should be fine. If you are overweight you may want to cut down on them.