Blueberries contain a brain active agent that fights cancer and promotes heart health and immune system health. Blueberries are also rich in antioxidants, can help the body to prevent cancer, diabetes and age-related memory loss, so blueberries are also known as "brain berries". Research shows that blueberries contain a lot of fiber, vitamins A and C, beneficial to cardiovascular health. Nutritionists suggest that 1 cup of fresh blueberries or 1/2 cup of frozen or dried blueberries per day is good for your health. Purple grapes, raisins, and strawberries all have similar effects. Nutritious Food Pairing - Blueberry Yogurt: Add canned blueberry fruit pieces to 1 cup of yogurt and serve.