Improving the gap between how vintage your body actually is – your biological age – and your chronological age may be linked to a lower risk of stroke and better brain health, according to preliminary research presented this week. The findings, released March 5, 2026, and slated for presentation at the American Academy of Neurology’s 78th Annual Meeting this April, suggest that optimizing this “age gap” could be a pathway to preserving cognitive function as we age. Even as the study doesn’t prove a cause-and-effect relationship, the association observed among nearly 260,000 participants is prompting further investigation into lifestyle factors that might influence biological age.
Researchers analyzed data from a healthcare research database, focusing on 258,169 individuals. Biological age was determined by measuring 18 biomarkers in blood samples – including cholesterol levels, red blood cell volume, and white blood cell counts – both at the start of the study and again six years later for a subset of participants. Over an average of 10 years, the team tracked stroke incidence and, for a smaller group, assessed cognitive function through memory and thinking tests, as well as examining brain scans for signs of damage. This research into biological age and brain health offers a new perspective on preventative care.
Biological vs. Chronological Age: What’s the Difference?
At the study’s outset, participants had an average biological age of 54, compared to a chronological age of 56. Six years later, their average biological age had increased to 58, while their chronological age rose to 62. This difference – or gap – between the two ages proved to be significant. Individuals whose biological age exceeded their chronological age exhibited less favorable results on brain scans and scored lower on cognitive assessments. They also faced a 41% higher risk of stroke compared to those with a smaller age gap.
Still, the most encouraging finding centered on those who successfully narrowed the gap between their biological and chronological ages. These individuals were 23% less likely to experience a stroke during the follow-up period. They showed a reduction in white matter hyperintensities – indicators of damaged white matter tissue – with a 13% decrease in total damage for each standard deviation of improvement in their age gap.
Lifestyle Factors May Play a Key Role
“It’s exciting to consider that working to modify our biological age could be a pathway to preserving brain health,” said Cyprien Rivier, MD, MSc, study author from Yale University and a member of the American Academy of Neurology. “Lifestyle habits that support cardiovascular and metabolic health, like a healthy diet, regular exercise, adequate sleep and good blood pressure control, may support narrow the biological age gap, though we did not evaluate lifestyle programs in this study.”
The study accounted for other factors known to influence stroke risk and brain health, such as high blood pressure, vascular conditions, and socioeconomic status. Despite these adjustments, the association between a shrinking age gap and improved outcomes remained statistically significant.
Limitations and Future Research
Researchers emphasize that this study establishes an association, not causation. While the findings are promising, they don’t definitively prove that reducing the biological age gap directly prevents stroke or improves brain health. The study also acknowledges limitations, including the fact that repeat blood tests were only available for a subset of participants, which limits conclusions about changes over time, particularly regarding cognitive tests.
“More research is needed, testing whether lowering people’s biological age gap can be demonstrated to reduce the risk of stroke and later-life brain injury,” Rivier stated. Future studies will likely focus on interventions – such as targeted dietary changes or exercise programs – to determine if actively reducing biological age can translate into tangible health benefits.
The research was supported by the American Academy of Neurology/American Heart Association Ralph L. Sacco Scholarship in Brain Health, awarded to Rivier in 2024.
Disclaimer: This article provides information for general knowledge and informational purposes only, and does not constitute medical advice. It is essential to consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
The full findings of this study will be presented at the American Academy of Neurology’s 78th Annual Meeting, taking place April 18-22, 2026, in Chicago and online. Researchers will continue to analyze the data and explore potential interventions to help individuals optimize their biological age and protect their long-term brain health. We will continue to follow this research as it develops.
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