Blueberries are sweet, nutritious and wildly popular.Often labelled a “superfood,” they are low incalories and incredibly good for healh.Blueberries are small, around 5-16 millimeters (0.2-0.6 inches) in diameter, and have a flared crown at the end.They are green in color at first, the It is low in calories, but high in fiber, vitamin C and vitamin K.n change to blue-purple as they ripen.
