Recent studies show that the powerful antioxidants and phytochemicals in blueberries may improve cognitive function. Paired with walnuts, they make a blueberry smoothie that tops the antioxidant chart. The rich nuttiness of the walnuts complements the berries, and they may work a little magic on your memory. Word has it that walnuts contain essential fatty acids that support the development of brain cells and neurotransmitters, so sip this unforgettable smoothie and you may just forget less!