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Families often think about heart health and brain health as two separate concerns. In reality, they are closely connected. Blood vessels deliver oxygen and nutrients throughout the body, including the brain and conditions that affect the vascular system can influence health over many years.
A recent study highlighted by the National Institutes of Health adds valuable long-term perspective. Researchers examined whether three vascular risk factors at age 55, smoking, high blood pressure and diabetes, were associated with how many years people later lived without dementia.
The study does not mean that dementia can be prevented simply by eliminating these risk factors. Instead, it supports a practical reminder: taking care of vascular health in midlife and beyond is an important part of overall healthy aging.
Researchers analyzed health information from 12,409 adults participating in the Atherosclerosis Risk in Communities (ARIC) study. When researchers assessed participants at age 55, none had dementia. The study then followed participants through 2022, allowing researchers to examine dementia diagnoses and survival over roughly three decades.
During the follow-up period:
On average, participants with none of the three risk factors lived about 13 more years without dementia after age 55 than those who had all three.
It is important to understand what this finding does and does not tell us.
This was an observational study, meaning it identified an association between vascular risk factors and later outcomes. It cannot prove that eliminating a specific risk factor will prevent dementia in an individual person.
Dementia risk is influenced by many factors, including genetics, overall health, environment, access to health care and social circumstances. The researchers also found differences by sex and race, highlighting the importance of understanding health disparities rather than assuming that everyone has the same risk.
The most helpful takeaway is not fear. It is awareness.
Common health concerns such as high blood pressure, diabetes and smoking deserve consistent attention. High blood pressure can exist without noticeable symptoms. Diabetes management may involve medications, nutrition, physical activity, monitoring and regular medical appointments. And quitting smoking can be difficult and may take multiple attempts.
Support can make these everyday health tasks easier.
Family caregivers can help without making an older loved one feel monitored or controlled. When possible, ask permission before offering reminders and focus on the person’s own goals.
Practical support might include:
The goal is to support independence—not take control.
Talk with a qualified health care professional about how often blood pressure, blood sugar and other important health measures should be checked.
Medications should be taken only as directed. If there are concerns about side effects, cost, or confusing instructions, talk with a physician or pharmacist rather than changing medications independently.
Quitting smoking can be challenging, but people do not have to do it alone. Counseling and approved smoking-cessation treatments may help. A health care professional can recommend options based on an individual’s health and medications.
Healthy habits do not have to mean an all-or-nothing lifestyle change. Sustainable routines involving movement, sleep, meals and regular medical care are often easier to maintain over time.
Any new exercise or lifestyle change should be appropriate for the individual’s abilities and discussed with a qualified health care professional when needed.
Non-medical home care does not diagnose, treat, or prevent dementia. However, it can help some families maintain consistency with everyday routines that support an established care plan.
Depending on an individual’s needs, in-home caregivers may provide assistance with:
The right support should always respect the older adult’s preferences and promote as much independence as possible.
For families in North San Diego County, a helpful place to start may simply be a conversation:
Which health-related task has become hardest to keep up with?
And:
What kind of practical support would make things easier without taking away independence?
These questions can help turn a broad research finding into practical support for everyday life.
Research continues to explore the relationship between vascular health, aging and dementia. While no single approach guarantees dementia prevention, staying engaged with routine health care and addressing known health concerns can be an important part of supporting overall well-being.
Medical Information Disclaimer: This article is intended for general educational purposes and is not medical advice. Dementia risk and vascular health are individual. Consult a physician or other qualified health care professional before making changes to medications, diet, physical activity, or treatment.
If daily routines or appointment logistics are becoming difficult for someone you care about, ComForCare Home Care North San Diego can discuss non-medical home care options that complement the family’s established care plan.
Call (858) 247-1005 to learn more about in-home support for seniors and adults in North San Diego County.
Sources
National Institutes of Health. “Dementia-free years may decrease with smoking, hypertension, and diabetes.” August 25, 2026. https://www.nih.gov/news-events/nih-research-matters/dementia-free-years-may-decrease-smoking-hypertension-diabetes
Hu J, et al. “Midlife Vascular Risk Burden and Dementia-Free Survival Years: The Atherosclerosis Risk in Communities Neurocognitive Study.” Neurology Open Access. August 5, 2026. DOI: 10.1212/WN9.0000000000000152.
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