Raw blueberries are full of nutrients and can definitely be a part of your low-carb diet. Though slightly higher in carbs than strawberries, blueberries are still only 21 grams of carbs and 4 grams of fiber, making 17 grams of net carbs in a 148-gram serving. 148 grams is quite a large serving, considering we have around 200 grams in whole batch of these muffins!