Frozen blueberries vs. fresh blueberries
The champ: frozen blueberries
Frozen berries such as blueberries and raspberries are picked at peak ripeness and flash frozen very soon afterward to lock in nutrients, antioxidants and flavor. Fresh berries, when out of season, have been trucked in from afar, and probably had significant nutrient loss by the time they top your oatmeal. Frozen wild blueberries have been shown to be especially rich in disease-thwarting antioxidants.