Eat foods high in antioxidants
Antioxidants protect all your cells, including brain cells. Some of the foods highest in antioxidants include: prunes, raisins, blueberries, blackberries, garlic, kale, cranberries, strawberries, spinach, and raspberries. In one test, rats had age-related mental decline reversed by eating the equivalent of a 1/2 cup of blueberries per day.