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. Longan vs Blackcurrant Nutrition will help you choose the best fruit among the two. Carbs in Longan and Blackcurrant are 15.00 g and 15.40 g respectively. The protein content of Longan and Blackcurrant is 1.30 g and 1.40 g. Protein to carb ratio of any fruit must be approximately 1.34. Protein to carb ratio of Longan is 0.09 and in Blackcurrant, it is 0.09. Nutritional value of fruits is incomparable to other food items. They provide all the vital nutrients required for proper functioning of our body.