Health Canada remains steadfast in its approval of a widely-used herbicide despite the recent withdrawal of a pivotal research paper. The study, conducted 25 years ago, had declared glyphosate, the primary component in Roundup, as safe for human use. However, the journal Regulatory Toxicology and Pharmacology retracted the paper last week following revelations from U.S. legal proceedings.
The retraction raised concerns, with Beatrice Olivastri, CEO of Friends of the Earth Canada, describing it as a significant development. She noted that the retracted study had served as a cornerstone for regulatory decisions on glyphosate safety.
According to the retraction notice, documents from the U.S. litigation implied potential ghostwriting by Monsanto employees, the manufacturer of Roundup, and suggested undisclosed payments to the study authors. The conclusions regarding glyphosate’s carcinogenic properties were allegedly based solely on unpublished Monsanto studies.
Despite this retraction, Health Canada emphasized that its prior evaluation of glyphosate was not impacted, as it had independently assessed the primary data sources used in the retracted paper. The department’s comprehensive re-evaluation involved over 1,300 studies, including industry-supplied data and information from various regulatory bodies.
Concerns persist among environmental advocates, such as Cassie Barker from Environmental Defence, who urged Health Canada to conduct a prompt review of current scientific findings on glyphosate. The herbicide, widely utilized in agriculture and forestry, is a top-selling pesticide in Canada and globally.
Both Bayer and Monsanto, key players in the glyphosate market, reiterated their confidence in the product’s safety. They cited endorsements from global health regulators, including Health Canada, which have consistently deemed glyphosate safe when used as directed.
While differing opinions exist on glyphosate’s safety, the retraction of the research paper underscores the need for ongoing scrutiny and reassessment of pesticide regulations based on the latest scientific evidence.