The plaintiff sued Monsanto in 2019, alleging that two decades of Roundup use had caused his non-Hodgkin lymphoma, a type of blood cancer. A jury sided with him in 2023, awarding him $1.25 million, but the Supreme Court took up the case on appeal. The Trump administration backed Bayer’s petition. The Biden administration had taken the opposite stance in a previous Roundup-related case against Bayer, urging the Supreme Court to reject its appeal.
In a 7-2 ruling Thursday, the court said Bayer cannot be sued in state courts because federal regulations have found that a cancer link to Roundup is unlikely and does not require a warning label.
EPA determined in 2020, during the first Trump administration, that glyphosate is unlikely to be a human carcinogen. Environmental groups sued, and a federal appeals court ruled that the EPA had not adequately explained its analysis. The EPA agreed to update its evaluation, though it has not published a new version yet.
The International Agency for Research on Cancer, part of the World Health Organization, classified glyphosate in 2015 as “probably carcinogenic to humans.”