Cardiovascular Health May Shield Diabetics From cognitive Decline, Landmark Study Finds
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Maintaining optimal heart health could significantly lower the risk of cognitive impairment and dementia in adults with type 2 diabetes (T2D), even those with a high genetic predisposition to these conditions, according to research presented at the American Heart Association (AHA) Scientific Sessions 2025 in new Orleans. The findings underscore the critical link between cardiovascular and brain health and offer a promising pathway for mitigating cognitive decline in a vulnerable population.
The AHA’s 2025 Heart Disease and Stroke Statistics Update already highlights the increased probability of impaired cognitive function and rapid decline among individuals with T2D. This new study, however, delves into whether proactively improving cardiovascular health can counteract that elevated risk, specifically examining the interplay between lifestyle, genetic factors, and dementia susceptibility.
A Large-Scale Investigation into Heart-Brain connection
Researchers, led by Yilin Yoshida, PhD, MPH, FAHA, of Tulane University School of Medicine, analyzed data from over 40,000 adults with T2D from the UK Biobank. Participants, all dementia-free at the study’s outset, were followed for 13 years. Throughout the study, their cardiovascular health was assessed using the AHA’s Life’s Essential 8 (LE8) metrics – a complete measure encompassing both health behaviors and factors like cholesterol, blood sugar, and weight.
cardiovascular health – at a moderate or high level – was associated with a 27% reduction in the risk of MCI and a 23% reduction in the risk of dementia. Furthermore, higher LE8 scores demonstrated a strong correlation with retained brain volume, a critical indicator of brain health, as neurodegenerative diseases are often characterized by brain shrinkage.
“People with type 2 diabetes tend to have more obesity, higher blood pressure, and insulin resistance,” Yoshida explained. “Controlling all those factors improves cardiovascular health and, as our findings suggest, may also help protect cognitive function.”
xiu Wu, PhD, a postdoctoral fellow at Tulane University and the study’s first author, emphasized the broader implications. “Genes are not destiny,” she stated. “Maintaining optimal cardiovascular health can protect brain health even for people with type 2 diabetes who carry the highest genetic risk for dementia.”
Expert Commentary: Heart health is Brain Health
External experts echoed these findings. “It’s another great example of what’s good for the heart is good for the brain, even when your genes might potentially be stacked against you,” said Hugo aparicio, MD, MPH, FAHA, associate professor of neurology at Boston University and chair of the AHA’s Stroke Council Brain Health Commitee, who was not involved in the study.
Implications for Clinical Practice and future Research
The study reinforces the idea that adhering to the AHA’s Life’s Essential 8 – thru dietary improvements,regular physical activity,adequate sleep,and effective management of metabolic risk factors – represents an accessible and potentially powerful strategy for preserving cognitive health in individuals with diabetes. While observational in nature, the findings highlight the undeniable interconnectedness of cardiovascular and brain health.
“In the past, we focused on the message: live healthy, live long,” Yoshida said. “though, it’s not just about longevity-it’s about maintaining our cognitive function and quality of life. Our findings show you can do both.”
Optimal cardiovascular health among people with Type 2 diabetes may offset dementia risk. American Heart Association. Published November 3,2025. Accessed November 6, 2025. https://newsroom.heart.org/news/optimal-cardiovascular-health-among-people-with-type-2-diabetes-may-offset-dementia-risk?preview=5030&preview_mode=True
