Does a daily banana shake helps in increasing weight?

Weight loss. Weight gain depends on your total calorie consumption for a day in relation to calorie expenditure (i.E daily activity and excercise) banyans do have a high glycemic index and 1 serving of medium banana is equivalent to 2 servings of carb i.e. 30 grams you might want to add half a banana instead of 1 to your shake and exercise more and watch your total calorie intake for the entire day.