Air Pollution Raises Alzheimer's Risk for Millions

Air Pollution Raises Alzheimer's Risk for Millions

Feb 20, 2026, 1:47 AM en 6 views

TL;DR

A study of 28 million older Americans found that long-term exposure to air pollution is directly linked to increased Alzheimer's risk. The impact is most pronounced in those with a history of stroke.

Research led by Yanling Deng from Emory University has uncovered a link between air pollution and Alzheimer's disease in older adults. Analyzing data from over 27.8 million Medicare beneficiaries between 2000 and 2018, the study found a direct connection between high pollution levels and increased Alzheimer's cases. Particularly vulnerable are those with a history of stroke, though hypertension and depression do not significantly alter the risk. These findings suggest the need for cleaner air as a strategy to combat dementia in aging populations.

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