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Six steps to cognitive health

So how do you keep your brain healthy, stay cognitively fit, and build your cognitive reserve? It's easier for some people than for others. And though genetics set the stage for your brain health, you can do something to improve your brain health and cognitive fitness.

First it is important to remember that you need a healthy body to have a healthy brain. Therefore, ensuring your brain health depends upon regularly visiting us, following recommendations, and managing any health conditions you have.

The heart of your brain health and cognitive fitness program, however, involves lifestyle changes. Researchers at Harvard Medical School have identified six cornerstones to any effective brain health and cognitive fitness program. Though we refer to them as "steps," they should all be done together rather than sequentially:

Step 1:

Eat a plant-based diet 

Step 2:

Exercise regularly

Step 3:

Get enough sleep 

Step 4:

Manage your stress 

Step 5:

Nurture social contacts 

Step 6:

Continue to challenge your brain 

Together, these can yield real results, leading to changes in both your brain's structure and function. But the key word is "together." These factors are equal parts of a cohesive plan—they don't work in isolation. Simply eating more fiber or adding a morning walk to your routine isn't enough to forestall mental decline. Instead, exercise, diet, sleep, stress management, social interaction, and mental stimulation work in concert to yield results.

Foods linked to better brainpower

Just as there is no magic pill to prevent cognitive decline, no single almighty brain food can ensure a sharp brain as you age. Nutritionists emphasize that the most important strategy is to follow a healthy dietary pattern that includes a lot of fruits, vegetables, legumes, and whole grains. Try to get protein from plant sources and fish and chose healthy fats, such as olive oil or canola, rather than saturated fats.

That said, certain foods in this overall scheme are particularly rich in healthful components like omega-3 fatty acids, B vitamins, and antioxidants, which are known to support brain health and often referred to as foods. Incorporating many of these foods into a healthy diet on a regular basis can improve the health of your brain, which could translate into better mental function.

Research shows that the best brain foods are the same ones that protect your heart and blood vessels, including the following:

Green, leafy vegetables.

Leafy greens such as kale, spinach, collards, and broccoli are rich in brain-healthy nutrients like vitamin K, lutein, folate, and beta carotene. Research suggests these plant-based foods may help slow cognitive decline.

Fatty fish.

Fatty fish are abundant sources of omega-3 fatty acids, healthy unsaturated fats that have been linked to lower blood levels of beta-amyloid—the protein that forms damaging clumps in the brains of people with Alzheimer's disease. Try to eat fish at least twice a week, but choose varieties that are low in mercury, such as salmon, cod, canned light tuna, and pollack. If you're not a fan of fish, ask your doctor about taking an omega-3 supplement, or choose terrestrial omega-3 sources such as flaxseeds, avocados, and walnuts.

Berries.

Flavonoids, the natural plant pigments that give berries their brilliant hues, also help improve memory, research shows. In a 2012 study published in Annals of Neurology, researchers at Harvard's Brigham and Women's Hospital found that women who consumed two or more servings of strawberries and blueberries each week delayed memory decline by up to two-and-a-half years.

Tea and coffee.

The caffeine in your morning cup of coffee or tea might offer more than just a short-term concentration boost. In a 2014 study published in The Journal of Nutrition, participants with higher caffeine consumption scored better on tests of mental function. Caffeine might also help solidify new memories, according to other research. Investigators at Johns Hopkins University asked participants to study a series of images and then take either a placebo or a 200-milligram caffeine tablet. More members of the caffeine group were able to correctly identify the images on the following day.

Walnuts.

Nuts are excellent sources of protein and healthy fats, and one type of nut in particular might also improve memory. A 2015 study from UCLA linked higher walnut consumption to improved cognitive test scores. Walnuts are high in a type of omega-3 fatty acid called alpha-linolenic acid (ALA), which helps lower blood pressure and protects arteries. That's good for both the heart and brain.