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. Guava vs Blueberry Nutrition will help you choose the best fruit among the two. Carbs in Guava and Blueberry are 14.30 g and 14.49 g respectively. The protein content of Guava and Blueberry is 2.50 g and 0.74 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of Guava is 0.18 and in Blueberry, 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.