If you're feeling forgetful, it could be due to a lack of sleep or a number of other reasons, including genetics, level of physical activity and lifestyle and environmental factors. However, there's no doubt that diet also plays a role in brain health. The best menu for supporting memory and brain function encourages good blood flow to the brain — much like what you'd eat to nourish and protect your heart. Research is finding the Mediterranean Diet may help keep aging brains sharp, and a growing body of evidence links foods such as those in the Mediterranean diet with better cognitive function, memory and alertness.