Although some risk factors such as age or genes cannot be changed, other risk factors such as high blood pressure and lack of exercise usually can be changed by following appropriate healthy lifestyle changes.
One such is to inculcate physical exercise in your daily routine. Exercise can help the brain cells by increasing the flow of blood and oxygen in your brain.
There is evidence that eating food that is good for the heart can also help to protect the brain. This includes limiting the intake of sugar and saturated fats. You should eat lots of fruits, vegetables, and whole grains in your daily diet. Some of these beneficial foods also include low-fat dairy products, fish, poultry, beans, seeds, nuts and vegetable oils.
Several studies have also shown that having strong social connections as we age can also help to lower risks of Alzheimer's and cognitive decline. This could be due to direct mechanisms through which social stimulation strengthens connections between the nerve cells in the brain.