Researchers tracking more than 132,000 Danish residents between 2006 and 2021 found that statin use was associated with reduced dementia risk, according to findings presented at the European Society of Cardiology’s annual congress and published in the Lancet Regional Health Europe journal. Those who initiated statin treatment during the study period showed a 10% lower relative risk of developing dementia, while those who began taking the drugs early demonstrated a 15% lower relative risk. Among the study participants, 2.7% developed dementia over the follow-up period.
Statins work by reducing low-density lipoprotein cholesterol levels, which can accumulate in arteries and restrict blood flow. Researchers hypothesized that by lowering LDL cholesterol, statins may protect the brain’s blood supply and reduce the risk of cerebrovascular disease, which is linked to dementia development. The mechanism suggests that controlling cholesterol levels from midlife onward could be a modifiable risk factor in dementia prevention. Previous research has indicated that addressing multiple risk factors simultaneously offers the greatest potential for preventing or delaying dementia cases.
All participants in the study had type 2 diabetes, though researchers suggested the findings could have broader applications. Dr. Tummas Ternhamar, who presented the research, indicated that the results support a comprehensive approach to dementia risk reduction combining multiple interventions, including physical activity and dietary measures, alongside cholesterol management. Experts emphasized that statins are widely available and inexpensive, making such findings potentially significant for public health initiatives.
Scientific observers noted that while the study demonstrates an association between statin use and reduced dementia risk, additional research is needed to establish direct causation. The observational nature of the study means it cannot definitively prove that statins themselves reduce dementia risk, though some trial evidence supports this connection. Researchers continue investigating the precise biological mechanisms linking statin use to potential dementia risk reduction.
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