Food has a powerful effect on our brains, especially as we age. "However, we sometimes think the brain is a separate system from the rest of our body," says Dianna Purvis Jaffin PhD, brain performance researcher. She and other scientists are eager to correct that misconception, highlighting a growing body of research showing that certain foods may help maintain mental sharpness and prevent Alzheimer's and other neurodegenerative diseases. These nutrient-packed picks contain specific compounds that are beneficial for the ageing brain.