What to know about paraquat and Parkinson’s as Missouri lawmakers consider restrictions

What to know about paraquat and Parkinson’s as Missouri lawmakers consider restrictions

Author: St. Louis Public Radio March 10, 2026 Duration: 29:53
For years, Parkinson’s disease was thought to be primarily genetic. And while some cases are rooted in genetic changes, new studies suggest diagnoses of the disorder, which is the world’s fastest-growing brain disease, is largely driven by environmental toxins — specifically, long-term exposure to the herbicide paraquat. Reporter Mike Fitzgerald discusses why agricultural giant Syngenta is halting global production of the herbicide by the end of June 2026. This move follows massive legal pressure from nearly 6,500 lawsuits filed in East St. Louis federal court. Fitzgerald also talks about the growing push for a national paraquat ban, and why an upcoming Missouri statehouse hearing about the weed killer is critical.

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