As a cruciferous vegetable, Brussels sprouts offer several health benefits. For instance, they are high in fiber, antioxidants, and several vitamins and minerals: vitamins C and K, calcium, folate, potassium, and iron. A 1-cup serving of Brussels sprouts has only 56 calories, 0 grams of fat, and 11 carbohydrates but boasts 4 grams each of protein and fiber.