The Supreme Court on Thursday ruled that Monsanto, the manufacturer of the weedkiller Roundup, does not have to comply with state laws to include a cancer warning on the product's label because the EPA has said it is not required to do so. File Photo by Mike Theiler/UPI. | License Photo

June 25 (UPI) -- Monsanto, which manufactures the weedkiller Roundup, cannot be sued for lacking labels that warn buyers that the product may cause cancer, the Supreme Court ruled on Thursday.

Because the Environmental Protection Agency has said the weedkiller is safe and does not need a warning label, Monsanto is not required under federal law to include one and, as a result, states cannot require it do so, CBS News and USA Today reported.

Roundup has for more than a decade been the subject of lawsuits on the assertion that its active ingredient, glyphosate, gave people non-Hodgkin's lymphoma after a World Health Organization agency classified the chemical as a probable human carcinogen.

The Court ruled 7-2 in favor of Monsanto in a case brought in Missouri by John Durnell in 2019 alleging that his use of Roundup for roughly 20 years had caused his non-Hodgkin's lymphoma and that the product should have included a cancer warning on its label.