Dragon fruit is a new name for pitaya and is scientifically known as Selenicereus undatus. Carbs, 13.5 Grams Fat, 0.2 Grams Protein, 1.2 Grams Sugars, 8 Grams Vitamin B1, 0.045 Mg Vitamin B2, 0.05 Mg Vitamin B3, 0.45 Mg Vitamin C, 9.2 Mg Phosphorous, 36 Mg Calcium, 8.5 Mg Iron, 0.7 Mg Sodium, 60 Mg Potassium, 300 Mg