Cranberries are small, round berries with a bright red color and sour flavor and are related to blueberries. Most cranberry products have added sugar because unsweetened cranberries are sour and hard to eat. If you’re living with diabetes, reading food labels and choosing cranberry products with the least amount of added sugar and grams of carbohydrate will make it easier to fit them into your eating plan. Nutritional Benefits of Cranberries There’s a ton of nutrition packed into these tiny berries. One cup of fresh cranberries has just 45 calories, 12 grams of carbohydrate, 4 grams of fiber