1, 20 grains or so is appropriate. Although the blueberry flavor sweet and sour, high nutritional value, but then the good southeast should not be consumed in excess, and blueberries are still a kind of cool fruits, generally consume 20 or so a day, should not be consumed in excess.

2, not recommended to eat a box. Generally speaking, the weight of a box of blueberries on the market now is about 125 grams, a person a day to eat a box of blueberries beyond the recommended intake of blueberries, therefore, it is not recommended to eat a box a day.