5 Scientifically-Proven Tips That Prevent Dementia

Alzheimer’s is the sixth-leading cause of death in the United States and there are more than 5 million people who currently suffer from the mental disintegration caused by Alzheimer’s disease (AD). The number of people affected by the disease is expected to triple by 2050 and its costs are projected to be more than $380 billion annually by 2040.

In the blue zone of Ikaria, Greece, dementia is almost nonexistent. So drawing on the latest scientific research and the residents of blue zones around the world, what can we do to prevent it?

Here are five scientifically proven tips that help prevent Alzheimer’s disease and other forms of dementia.

1.) Walk daily

You don’t need to join a fitness class to maintain brain vitality! Interestingly, there is no association between intense physical exercise and Alzheimer’s risk. On the contrary, the best way to prevent mental decline is to walk daily. Walking about five miles per week increases brain volume, and correlates well with the prevention of AD and other forms of dementia. Additionally, a sedentary lifestyle can more than double the risk of developing Alzheimer’s, making it more impactful than heavy smoking! Other forms of light, regular exercise like gardening also have a preventive effect.

2.) Combat depression

Stress and depression contribute to the onset of many chronic diseases. It is not surprising then, that depression is an early warning sign of dementia! People who show signs of depression as early as midlife have a 50 percent greater chance of developing AD.

A growing body of evidence supports the preventive effect of a positive attitude and purpose in life on mental decline. Strategies to help you in this endeavor include volunteering, appealing to a higher power (i.e. practicing a religion), meditating, and using deep breathing techniques. If you have severe depression, consider seeking a trained professional.

3.) Cut the smoking habit

Several studies show heavy smokers (20+ cigarettes/day) have reduced gray matter density as they age compared to non-smokers. Smoking actually doubles the risk of developing Alzheimer’s disease. Luckily for current smokers, quitting seems to reduce these effects to that of a non-smoker.

4.) Learn new hobbies

Knitting, playing board games, or learning other crafts during mid-life can reduce memory loss by 40-50 percent. Television is not a hobby! Elders who spent their day (seven or more hours) watching television are 50 percent more likely to experience memory loss. Some evidence shows playing a musical instrument also helps protect cognitive function. There are documented cases of individuals in the throes of mental decline responding positively to music from their childhood, even recalling events from their past.

5.) Get social

According to the Alzheimer’s Association, one in seven people who have dementia or Alzheimer’s live alone. That adds up to 800,000 people! Socially active people have up to a 50 percent reduced risk of developing dementia. There are a variety of positive effects social engagement can provide as a buffer against dementia, including improving your mood and giving you a support network when you need it the most. Volunteering with friends may serve a double effect by improving mood and providing a purpose! One study reported people whose brains were severely affected by AD were still able to perform well on memory tests providing they had a large social network.

In terms of diseases people are most scared of, Alzheimer’s is second only to cancer. Following these five evidence-based tips will give you the best chance of avoiding this deadly condition.

What is Alzheimer’s Disease?

Alzheimer’s earns the title as the most common type of dementia, brain wasting diseases that result in brain cell death. Dementia causes memory to deteriorate and in some cases, people with Alzheimer’s experience difficulty speaking, understanding written and spoken words, recognizing certain objects, and exercising good judgment. In severe cases, patients have extreme difficulty completing familiar tasks in the home and experience confusion surrounding where and when they are.

Warning signs of Alzheimer’s Disease

Astoundingly, warning signs of Alzheimer’s can appear in the brain as many as 20 years before noticeable outward symptoms! Research into this confounding condition shows environmental risk factors like smoking, depression, and inactivity all contribute to its development. If this list looks familiar, it may be because these lifestyle behaviors also impact heart health. As it turns out, heart health and brain health are directly intertwined! Like the heart, the brain needs a healthy supply of oxygen and nutrients to function properly, which are delivered via the bloodstream.


1Unpublished tabulations based on data from the Medicare Current Beneficiary Survey for  2008.
Prepared under contract by Julie Bynum, M.D., M.P.H., Dartmouth Institute for Health Policy and Clinical Practice
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