Increase your mental agility and improve your memory simply by choosing the right foods:

Fish Really is Brain Food
A protein source associated with a great brain boost is fish -- rich in omega 3 fatty acids, essential for brain function and development. These healthy fats have amazing brain power: higher dietary omega 3 fatty acids are linked to lower dementia and stroke risks; slower mental decline; and may play a vital role in enhancing memory, especially as we get older.

For brain and heart health, eat two servings of fish weekly.

Add a Daily Dose of Nuts and Chocolate
Nuts and seeds are good sources of the antioxidant vitamin E, which is associated with less cognitive decline as you age. Dark chocolate also has other powerful antioxidant properties. And it contains natural stimulants like caffeine, which can enhance focus and concentration.

Enjoy up to an ounce a day of nuts and dark chocolate to provide all the benefits you need without excess calories, fat, or sugar.

Add Avocados and Whole Grains
Every organ in the body depends on blood flow, especially the heart and brain. Eating a diet high in whole grains and fruits like avocados can reduce the risk of cardiovascular disease and lower bad cholesterol. This reduces your risk of plaque buildup and enhances blood flow, offering a simple, tasty way to fire up brain cells.

Whole grains, like popcorn and whole wheat, also contribute dietary fiber and vitamin E. Though avocados have fat, it's the good-for-you, monounsaturated fat that contributes to healthy blood flow.

Blueberries Are Super Nutritious
Research in animals shows that blueberries help protect the brain from oxidative stress and may reduce the effects of age-related conditions such as Alzheimer's disease or dementia. Studies also show that diets rich in blueberries significantly improved both the learning capacity and motor skills of aging rats, making them mentally equivalent to much younger rats.

For more advice on foods that are good for the brain visit WebMD.com