As per research the concentration of nutrients in black grapes are far more than other grape variants. The qualities of this magical fruit makes it a superfruit. Over the years there has been a debate around its close bonded properties like berries. In fact, in some regions grapes are also considered as berries and this simply because of its rich nutritional value. What's more, you will be amazed to know that half cup of black grapes contain about 48 calories, as well as 8 grams of carbohydrates, which makes it an amazing healthy option to go for!