Smoothies are a great refreshing snack idea for the summer months, but you may want to stop adding bananas to your blended fruit beverage if berries are included, since you could be stopping key nutrients from entering your body. According to expert advice from a food professor, mixing bananas and berries together could be preventing your body from reaping the full nutritional benefits of berries – which contain a natural compound known as flavanols. Why bananas shouldn’t be mixed with berriesGunter Kuhnle, a Professor of Nutrition and Food Science with expertise in dietary assessment and plan…