Nearly half of dementia cases may be linked to risks you can change
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- Lund University researchers followed nearly 500 participants averaging age 65 with no cognitive impairment for four years, tracking white matter changes alongside amyloid β and tau protein levels.
- Isabelle Glans and Sebastian Palmqvist reported that smoking, cardiovascular disease, high blood lipids, and high blood pressure were linked to faster white matter damage and blood vessel injury characteristic of vascular dementia.
- Diabetes was associated with increased amyloid β accumulation while lower BMI correlated with faster tau buildup—findings the researchers flagged as needing further validation in future studies.
- The study, published in The Journal of Prevention of Alzheimer's Disease (2026), noted that many dementia patients harbor multiple disease processes simultaneously, including both vascular damage and Alzheimer's-related changes.
- Palmqvist concluded that targeting vascular and metabolic risk factors may still reduce combined brain damage even in people at risk of Alzheimer's disease.
Why it matters: In the 500-person cohort tracked for four years, vascular risk factors drove measurable white matter damage—a concrete demonstration that midlife cardiovascular health directly shapes brain changes underlying vascular dementia, giving clinicians a specific biological pathway rather than a generic 'live healthier' message.
