5. Berries

Just like brightly colored vegetables, vibrant fruits are also rich in nutrients due to natural plant pigments known as flavonoids. Not only do flavonoids give berries their distinctive hue, but recent research suggests that flavonoid-rich berries can help you maintain (or improve!) cognitive function as you age.
6. Brussels, Broccoli, and Cauliflower

Cruciferous veggies are anti-inflammatory- and antioxidant-rich, and are full of vitamin C, selenium, folate, and potassium — all of which are linked to lowering your risk of cognitive decline. Cauliflower provides us with additional vitamin K, which is necessary for blood clotting and bone-mineral density. Plus, since cruciferous veggies contain a compound called glucosinolates, they can help protect your blood vessels. They eliminate harmful carcinogens from affecting DNA that could ultimately lead to cognitive decline.