Quick Facts

• People who narrowed the gap between biological and chronological age had 23% lower stroke risk
• Those with biological age older than chronological age faced 41% higher stroke risk
• Study tracked 204,000 participants and will be presented at American Academy of Neurology meeting in April

A major new study from Yale University reveals that people whose biological age is younger than their chronological age have dramatically lower stroke risk. The research, led by Dr. Cyprien Rivier, found a 23% reduction in stroke risk among participants who improved their biological age gap.

The study analyzed data from 204,000 participants and measured biological age using epigenetic markers derived from DNA methylation. Unlike chronological age, which counts years since birth, biological age reflects the cellular and molecular changes that occur during aging.

Participants whose biological age exceeded their chronological age faced a 41% higher stroke risk. They also showed worse brain scan results and lower cognitive test scores by the study’s end.

Brain Health Benefits Beyond Stroke Prevention

The research uncovered additional brain health advantages. People who improved their age gap had 13% less white matter damage for each standard deviation of improvement. White matter damage is linked to cognitive decline and increased dementia risk.

“It’s exciting to think that working to modify our biological age could be a pathway to preserving brain health,” said Rivier, who received funding from the American Academy of Neurology and American Heart Association.

Lifestyle Factors May Drive Changes

While the study didn’t test specific interventions, Rivier pointed to lifestyle habits that support cardiovascular health. These include healthy diet, regular exercise, adequate sleep, and blood pressure control.

Previous research supports these connections. Meta-analyses show DNA methylation measures of biological aging predict stroke risk across multiple studies. Stroke patients averaged 2.5 years older biologically than healthy controls.

Stroke Remains Major Health Threat

The findings come as stroke burden continues rising globally. Every 40 seconds, someone in the United States has a stroke. Annual stroke costs exceed $56 billion nationally.

Stroke ranks as the second leading cause of death worldwide and affects over 795,000 Americans yearly. The condition causes serious long-term disability and places enormous strain on healthcare systems.

“More research is needed, testing whether lowering people’s biological age gap can be demonstrated to reduce the risk of stroke,” Rivier noted. The study shows association, not causation, between age gap improvements and better outcomes.

The research will be presented at the American Academy of Neurology’s 78th Annual Meeting in Chicago, running April 18-22, 2026.

Read more: New Study Links A Younger Biological Age To 23% Lower Stroke Risk