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Jury Says Roundup Caused Man’s Cancer, Must Now Decide If Monsanto’s Liable

Monsanto corporate headquarters

For the second time in seven months, a jury has recognized a connection between Monsanto’s weed killer Roundup and cancer.

In a unanimous verdict on Tuesday, a six-member jury in San Francisco decided the glyphosate-based herbicide was a “substantial factor” in causing a California man’s cancer.

The verdict means that each of the first two Roundup cancer lawsuits to go to trial in state court and federal court ended with jury verdicts in favor of men who blamed Roundup for causing their cancer.

In August, a state jury in California found Monsanto, which was acquired by Bayer AG last year, had failed to warn school groundskeeper Dewayne “Lee” Johnson of the cancer risks posed by Roundup. Monsanto was ordered to pay $289 million, but a judge later reduced the award to about $78 million.

The federal jury in Edwin Hardeman’s case, however, was not initially asked to decide whether Monsanto should be held liable. A second phase of the case, which began Wednesday, will focus on that. Instead, jurors were asked first to decide whether Roundup caused Hardeman’s cancer.

The 70-year-old had used Roundup on his Sonoma County property to kill weeds and treat poison oak for 26 years, according to his attorneys. He was diagnosed with non-Hodgkin lymphoma in 2015.

During the trial, which started on Feb. 25, Hardeman’s legal team presented expert testimony and research that Roundup causes mutations in human cells, one of Hardeman’s lawyers, Jennifer Moore, told The New York Times. The lawyers also sought to demonstrate that humans who are exposed to the weed killer are more likely to develop non-Hodgkin lymphoma.

Glyphosate, the active ingredient in Roundup, is the most widely used herbicide in the world. The limited studies of cancer rates in people exposed to the herbicide have reached mixed conclusions. And international regulatory agencies disagree on whether glyphosate-based weed killers increase the risk of cancer.

The World Health Organization’s International Agency for Research on Cancer concluded in March 2015 that the herbicide is “probably carcinogenic to humans.” More recently, a 2019 analysis published in the journal Mutation Research/Reviews in Mutation Research found that people who had been exposed to large amounts of glyphosate herbicides showed a 41 percent higher relative risk for non-Hodgkin lymphoma.

But a draft report from an ongoing assessment by the U.S. Environmental Protection Agency says Roundup and other glyphosate-based herbicides present “low toxicity” to humans.

A Jan. 25, 2017 pretrial order noted that the plaintiffs were preparing to argue that the EPA’s findings are flawed and/or biased while Monsanto was preparing to argue the same about IARC’s conclusions.

Although the jury decided the herbicide use was a major factor in causing Hardeman’s cancer, Bayer said in a statement that it stands behind its Roundup products and “will vigorously defend them.”

“We are disappointed with the jury’s initial decision, but we continue to believe firmly that the science confirms glyphosate-based herbicides do not cause cancer,” Bayer said in the statement.

Monsanto faces more than 11,000 lawsuits over the weed killer.

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Impact on Other Roundup Lawsuits

Hardeman’s case is one of three test cases for future litigation. The test, or “bellwether,” cases are among the 804 Roundup lawsuits that have been consolidated in federal court in San Francisco under U.S. Judge Vince Chhabria. The outcome of bellwether cases can help lawyers decide whether to continue on with similar cases or settle them.

Legal experts, including Hardeman’s lawyer, say the verdicts will most likely influence the remaining cases before Chhabria. Some go as far as saying verdicts in favor of the plaintiffs would give their lawyers an upper hand in any settlement talks.

“What ends up happening is these start to be markers,” Vanderbilt University law professor Edward K. Cheng told The New York Times. “I would expect that Monsanto is going to start thinking about ‘How much risk do we face here?’ if one jury after another is going to say ‘Yes.’”

But Bayer doesn’t see it that way.

“Regardless of the outcome, however, the decision in phase one of this trial has no impact on future cases and trials because each one has its own factual and legal circumstances,” the company said in its statement. “We are confident the evidence in phase two will show that Monsanto’s conduct has been appropriate and the company should not be liable for Mr. Hardeman’s cancer.”

Roundup Cancer Trial: Phase Two

The same jury that decided Roundup played a role in causing Hardeman’s cancer must now decide whether Monsanto is liable for his injuries and, if so, how much the company should pay.

While phase one of the trial concentrated only on scientific evidence, phase two will focus on how much Monsanto knew about the herbicide’s possible cancer risk and whether the company tried to hide the potential dangers when it should have added a warning.

Brian Stekloff, a lawyer for Bayer, told the jury in his opening statement on Wednesday that multiple studies have shown Roundup is safe when people use it properly. He said the EPA has not pulled the herbicide from the market nor has it required safety warnings.

Meanwhile, Hardeman’s lawyers will try to prove the company downplayed the health risks by influencing public opinion and science. Unsealed court documents that include internal emails and emails between Monsanto and federal regulators indicate the company ghost-wrote scientific studies to manipulate regulatory reviews.

The documents also suggest there was some disagreement within the EPA over its risk assessment, and a senior EPA official had worked to quash a federal review of glyphosate.

Hardeman’s legal team will ask the jury to make the company pay for his medical bills on top of potentially huge compensatory and punitive damages.

Emily Miller
Written By Emily Miller Managing Editor

Emily Miller is an award-winning journalist with 7 years of professional experience writing and editing content for reputable media organizations across the U.S. She also has 13 years of personal experience as a patient living with Crohn’s disease. Her coverage of U.S. prescription drug prices for Drugwatch has been published or cited by news outlets, including The Hill, Fox Business and United Press International. Some of her qualifications include:

  • Society of Professional Journalists and The Alliance of Professional Health Advocates member
  • Centers for Disease Control and Prevention Health Literacy certificates
  • 2016 Florida Society of News Editors third place winner in Breaking News

13 Cited Research Articles writers follow rigorous sourcing guidelines and cite only trustworthy sources of information, including peer-reviewed journals, court records, academic organizations, highly regarded nonprofit organizations, government reports and interviews with qualified experts. Review our editorial policy to learn more about our process for producing accurate, current and balanced content.

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