Avoiding smoking, controlling high blood pressure, and preventing or managing diabetes during midlife may be associated with substantially more years lived without dementia, according to a new study published in the journal Neurology. Researchers found that people who reached midlife without any of these three vascular risk factors lived nearly 13 more years free of dementia than those who had all three.
The findings, reported by CNN, are based on data from more than 12,000 participants in the Atherosclerosis Risk in Communities (ARIC) study, who were followed for approximately 26 years. The research adds to growing evidence that maintaining good cardiovascular health during middle age may play an important role in preserving cognitive function later in life.
Study Finds Strong Link Between Midlife Vascular Health and Dementia Risk
Researchers analyzed how three common vascular risk factors, smoking, high blood pressure, and diabetes, affected the number of years participants lived without developing dementia. They found that individuals who had none of these risk factors in midlife lived about 30.1 years without dementia after age 45, compared with roughly 17 years among those with all three risk factors, a difference of nearly 13 years.
The study found an association between better vascular health and longer dementia-free survival, but it does not prove that eliminating these risk factors directly prevents dementia. Instead, the findings suggest that reducing or managing these conditions during midlife may contribute to healthier cognitive aging.
Researchers also observed differences among demographic groups. Women generally lived more years free of dementia than men, while White participants averaged more dementia-free years than Black participants. The authors noted that these findings highlight differences in lifetime risk and underscore the importance of equitable access to preventive healthcare.
How Health Plays a Key Role in Brain Health
The brain depends on a healthy network of blood vessels to receive oxygen and nutrients needed for normal function. Over time, conditions such as hypertension and diabetes can damage these blood vessels, while smoking accelerates vascular injury and increases the risk of stroke and other cardiovascular diseases. Collectively, these changes may contribute to cognitive decline and increase the likelihood of developing dementia.
Researchers believe the years between ages 45 and 65 represent a particularly important window for intervention because vascular damage often begins accumulating during this period, long before symptoms of dementia appear. Taking steps to manage blood pressure, avoid tobacco use, and prevent or control diabetes may therefore help preserve brain health later in life.
As neurologist Dr. Richard Isaacson, who was not involved in the study, told CNN, "It's never too early, or too late, to improve brain health." His comments reflect the growing consensus that addressing modifiable vascular risk factors throughout adulthood may support healthier cognitive aging.
Getting Older Doesn't Have to Be Difficult
According to the World Health Organization, dementia affects more than 55 million people worldwide and remains one of the leading causes of disability and dependency among older adults. It is not a normal part of aging but rather a syndrome caused by diseases that damage brain cells, leading to declines in memory, thinking, reasoning, and the ability to carry out everyday activities.
While there is currently no cure for most forms of dementia, experts emphasize that addressing modifiable risk factors can help reduce the likelihood of developing the condition. The latest findings reinforce that protecting cardiovascular health in midlife may also benefit long-term brain health, providing another reason to quit smoking, monitor blood pressure, and manage diabetes with the guidance of healthcare professionals.
Although the study does not establish a direct cause-and-effect relationship, it adds to a growing body of evidence suggesting that healthier choices during middle age are associated with better cognitive outcomes decades later. Combined with other healthy lifestyle habits, these measures may help more people maintain their independence and quality of life as they age.
