Startling evidence of the link between pesticides and Parkinson's disease.

A 2022 Meta-Analysis: Published in various forms (including systematic reviews such as those in Molecular Neurodegeneration and Environmental Health), this research aggregated data from dozens of cohort and case-control studies. It established the baseline general risk increase of 1.34- to 1.56-fold for individuals with regular pesticide exposure compared to the general population.

The Agricultural Health Study (AHS): A major, long-term study conducted by the National Institutes of Health (NIH) and the EPA, following over 80,000 farmers and their spouses in Iowa and North Carolina. This is the source of the data linking Paraquat and Rotenone to a 2.5 times higher risk of PD.

Duration of agricultural pesticide exposure application and Parkinson’s disease in California’s central valley

Two pesticides -- rotenone and paraquat -- linked to Parkinson's disease, study suggests

Investigating Parkinson’s disease risk across farming activities using data mining and large-scale administrative health data