• Air pollution linked to higher Alzheimerâ s risk in 28 million older Americans Long term exposure to air pollution may quietly raise alzheimerâ s risk. • Older adults who live with higher levels of air pollution are more likely to develop Alzheimer’s disease, according to new research led by Yanling Deng of Emory University, U.S.A. • The study was published February 17thin the open access journalPLOS Medicine. • Alzheimer’s is the most common type of dementia and affects roughly 57 million people worldwide. • Scientists have long recognized air pollution as a risk factor for Alzheimer’s, as well as for chronic conditions such as hypertension, stroke, and depression. • Because these conditions are also tied to dementia, researchers have questioned whether polluted air raises Alzheimer’s risk indirectly by contributing to those illnesses, or whether it harms the brain more directly.
Article Summaries:
- A large Medicare study of 27.8 million U.S. adults aged 65+ found that long‑term exposure to fine particulate air pollution is associated with a higher risk of developing Alzheimer’s disease. Researchers, led by Emory University’s Yanling Deng, analyzed data from 2000‑2018 and controlled for chronic conditions such as hypertension and depression. The increased risk was strongest among those with a prior stroke, suggesting direct neurotoxic effects of pollution rather than indirect effects through other illnesses. The findings highlight cleaner air as a potential strategy to reduce dementia rates in aging populations.
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