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flag Younger groundwater in carbonate aquifers linked to 24% higher Parkinson’s risk, older water to 6.5% lower risk, study finds.

flag A 2026 study links younger groundwater in carbonate aquifers to a 24% higher Parkinson’s disease risk, while older groundwater in the same systems is tied to a 6.5% lower risk per standard deviation in age. flag Analyzing data from over 12,000 patients and 1.2 million controls near 1,000 groundwater sites, researchers used water age and aquifer type as proxies for exposure to environmental neurotoxins, though no specific contaminants were identified. flag The findings, not yet peer-reviewed, suggest hydrogeology influences exposure to harmful substances, potentially through factors like pesticide or cyanobacterial byproduct infiltration, with climate and pollution trends possibly increasing risk. flag Experts call for expanded monitoring and further research to clarify links and inform prevention.

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