Every brain changes with age, and mental function changes along with brain shrinking. But cognitive impairment is not inevitable.

Here are 10 ways you can help maintain brain function.

Get regular exercise

Regular exercise is one factor that may help protect the brain from shrinkage as people grow older. This is because exercise can improve cognitive functioning, and being fit can help minimize the inevitable brain shrinkage that stems from the aging process.

Improve your diet

Good nutrition can help your mind as well as your body. For example, people that eat a Mediterranean style diet that emphasizes fruits, vegetables, fish, nuts, unsaturated oils (olive oil) and plant sources of proteins are less likely to develop cognitive impairment and dementia.

Improve blood pressure

High blood pressure is increasing the risk of cognitive decline in old age. To keep your pressure as low as possible with a healthy lifestyle, limit alcohol drinks, and eat right.

Improve blood sugar

Diabetes is an important risk factor for dementia, if blood sugar level stays high, you will need medication to achieve good control.

Improve your cholesterol

High levels of LDL ("bad") cholesterol are associated with an increased risk of dementia. Diet, exercise, weight control, and avoiding tobacco will go a long way toward improving your cholesterol levels. But if you need more help, ask your doctor about medication.

Avoid tobacco

Avoid tobacco in all its forms.

Don't abuse alcohol

Excessive drinking is a major risk factor for dementia. If you choose to drink, limit yourself to two drinks a day.

Care for emotions

Good mental health and restful sleep are certainly important to prevent the risk of cognitive function decline.

Get mental stimulation

Mental stimulating activities like word puzzles, drawing and painting, may help the brain generate new cells and build up a functional reserve that provides a hedge against future cell loss.

Build social networks

Strong social ties have been associated with a lower risk of dementia, as well as lower blood pressure and longer life expectancy.