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flag A 2026 study links long-term exposure to fine air pollution with increased Alzheimer’s risk in Americans over 65, suggesting direct brain harm.

flag A 2026 Emory University study of over 27 million Americans aged 65 and older links long-term exposure to fine air pollution (PM2.5) with a higher risk of Alzheimer’s disease, suggesting direct brain impacts rather than indirect effects through other health conditions. flag The research, based on Medicare data and environmental pollution levels from 2000 to 2018, found stronger associations in people with prior strokes and indicates pollution may damage the blood-brain barrier, accelerate brain aging, and increase dementia risk. flag Though the study cannot prove causation, it adds to growing evidence that air quality plays a role in neurodegeneration, supporting public health efforts to reduce pollution for brain health.

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