A new study from Emory University indicates that increased exposure to air pollution may elevate the risk of developing Alzheimer's disease. Researchers analyzed data from over 27.8 million U.S. Medicare recipients aged 65 and older between 2000 and 2018.
The findings suggest a direct correlation between air pollution and Alzheimer's diagnoses. The study observed a slightly stronger association in individuals with a history of stroke. While air pollution is a known risk factor for other chronic conditions like hypertension and depression, which are also linked to Alzheimer's, this research points to "direct pathways" rather than solely through these other health issues.
Experts suggest that improving air quality could be a significant measure in preventing dementia and protecting older adults. While the study highlights an association and not direct causation, it adds to a growing body of evidence on the impact of environmental factors on brain health. The Alzheimer's Association notes that Alzheimer's is a complex disease influenced by multiple factors, and reducing air pollution exposure may be an actionable step for some.
