While occasional forgetfulness can affect all ages, if you find your brain’s processing speed and efficiency fading as you get older, a lack of nutrients could be the culprit. “Lutein, a nutrient which has been shown in early research to enhance learning and memory, can be found in a variety of vegetables such as leafy greens, carrots, broccoli, corn, and tomatoes,” says Sauer. “Adding a few or all of these vegetables to your weekly meals can provide a helpful and natural brain boost.”