A whole cup of fresh basil leaves has just 11 calories, and about 5 million metric boatloads of flavor. You'll get 2 grams of carbohydrate, but it's virtually all in the form of fiber. And you'll get one gram of protein, but who eats herbs for the protein? You'll also get 33% of your vitamin A, 13% of your vitamin C, 7% each of your folacin, calcium, and iron, 6% of your potassium, and 2% of your niacin and zinc.