Nutrients are present in all the fruits but in different quantities. Hence, it is essential to be aware of the nutritional value of fruits before we add them to our health routine. Purple Mangosteen vs Banana Nutrition will help you choose the best fruit among the two. Carbs in Purple Mangosteen and Banana are 15.60 g and 22.80 g respectively. The protein content of Purple Mangosteen and Banana is 0.50 g and 1.10 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of Purple Mangosteen is 0.03 and in Banana, it is 0.05. Nutritional value of fruits is incomparable to other food items. They provide all the vital nutrients required for proper functioning of our body.