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. Pink Grapefruit vs Guava Nutrition will help you choose the best fruit among the two. Carbs in Pink Grapefruit and Guava are 10.70 g and 14.30 g respectively. The protein content of Pink Grapefruit and Guava is 0.80 g and 2.50 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of Pink Grapefruit is 0.07 and in Guava, it is 0.18. Nutritional value of fruits is incomparable to other food items. They provide all the vital nutrients required for proper functioning of our body.