Blueberries, strawberries and raspberries trace their origin to the Native American diet according to the center for Disease control and prevention. Eating blueberries won't make you lose weight, whenever you eat food, you're giving your body calories. However, blueberries are a low-calorie fruit that enhances your daily nutrition. Eating blueberries in lieu of more fattening snacks cuts the calories you get from your diet.