One cup of raw black currants (112g) provides 71 calories, 1.6g of protein, 17g of carbohydrates, and 0.5g of fat. Currants are an excellent source of vitamin C, iron, and potassium. The following nutrition information is provided by the USDA. • CARBS: Black currants have about 17.2 grams of carbohydrate per serving. They are a source of natural sugar. Black currants have a glycemic index of 22, which is considered low currants are nearly fat-free, with less than half a gram of fat per serving, also have higher protein than most other fruits, with 1.4 grams per serving. • VITAMINS & MINERALS: Currants are high in vitamin C, which supports healthy immune function. They also contain iron, which helps prevent anemia; calcium, which supports strong and healthy bones; and phosphorus, which aids in muscle contraction. Currants also contain anthocyanins which act as an antioxidant and can help prevent harm from free radicals. Darker-colored (black and red