Internal documents from chemical giant Syngenta reveal tactics to sponsor sympathetic scientific papers and mislead regulators about unfavorable resea

Revealed: The secret push to bury a weedkiller’s link to Parkinson’s disease

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2023-06-04 05:00:01

Internal documents from chemical giant Syngenta reveal tactics to sponsor sympathetic scientific papers and mislead regulators about unfavorable research

The global chemical giant Syngenta has sought to secretly influence scientific research regarding links between its top-selling weedkiller and Parkinson’s, internal corporate documents show.

While numerous independent researchers have determined that the weedkiller, paraquat, can cause neurological changes that are hallmarks of Parkinson’s, Syngenta has always maintained that the evidence linking paraquat to Parkinson’s disease is “fragmentary” and “inconclusive”.

But the scientific record they point to as proof of paraquat’s safety is the same one that Syngenta officials, scientists and lawyers in the US and the UK have worked over decades to create and at times, covertly manipulate, according to the trove of internal Syngenta files reviewed by the Guardian and the New Lede.

The files reveal an array of tactics, including enlisting a prominent UK scientist and other outside researchers who authored scientific literature that did not disclose any involvement with Syngenta; misleading regulators about the existence of unfavorable research conducted by its own scientists; and engaging lawyers to review and suggest edits for scientific reports in ways that downplayed worrisome findings.

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