What Proof Do You Need for a RoundUp Lawsuit?

If you believe exposure to RoundUp caused your cancer diagnosis, you are not alone—and you may be entitled to significant compensation. Over 181,000 people have filed claims against Bayer and Monsanto— the makers of the weedkiller, returning billions in settlements. However, RoundUp lawsuits aren’t simple. Success depends on the strength of your evidence. What proof do you need for a roundup lawsuit? To build a winning case, you must prove that you used or were exposed to RoundUp, that you developed an illness, and that exposure to the herbicide contributed directly to your illness.

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At Ankin Law, we build strong cases backed by real evidence, so our clients have the best shot at justice. If you believe you have a claim, call us at 312-600-0000 for a free consultation today.

Evidence of Exposure to RoundUp

The first step in your RoundUp lawsuit is establishing that you were exposed to the herbicide. Without this, your case cannot move forward.

Common types of exposure evidence in RoundUp lawsuits include:

  • Purchase records: Receipts, invoices, or purchase histories showing you bought RoundUp products.
  • Employment records: Proof that you worked in industries such as landscaping, farming, or groundskeeping where RoundUp was used.
  • Eyewitness testimony: Statements from coworkers, supervisors, or family members who saw you use or come into contact with RoundUp.
  • Photographs or videos: Any visual evidence showing you using RoundUp, particularly over an extended period.
  • Medical records noting exposure: In some cases, your doctor may have documented your RoundUp use or exposure during examinations.

Exposure isn’t limited to direct application. Even people who lived near large-scale agricultural operations spraying RoundUp have successfully filed lawsuits.

Medical Diagnosis Linking RoundUp to Your Illness

Once exposure is proven, you must show that RoundUp likely caused your medical condition.

Most RoundUp lawsuits involve diagnoses of non-Hodgkin lymphoma (NHL), but other cancers, like multiple myeloma and leukemia, have also been linked. To connect RoundUp to your illness, you need:

  • Official diagnosis: Medical records confirming your diagnosis from a qualified healthcare provider.
  • Histopathology reports: Biopsy results and lab analyses that detail the type and stage of cancer.
  • Treatment records: Documentation of chemotherapy, radiation, surgeries, and other treatments.

Scientific studies, such as the International Agency for Research on Cancer’s (IARC) 2015 findings classifying glyphosate (RoundUp’s active ingredient) as a “probable human carcinogen,” play a major role in connecting exposure to your diagnosis. But you will still need personalized medical evidence to strengthen your claim.

Causation Evidence

Proving you used RoundUp and that you have cancer isn’t enough. You must show causation—that RoundUp exposure likely caused your illness.

This is where the defense will fight the hardest. Their goal is to create doubt by pointing to other potential causes, like genetics, other chemical exposures, smoking history, or unrelated environmental factors.

Solid causation evidence may include:

  • Expert testimony: Medical experts who can confidently state that, based on your exposure history and diagnosis, RoundUp is a substantial contributing factor.
  • Scientific studies: Published research supporting the link between glyphosate exposure and your specific cancer.
  • Timing evidence: Documentation showing you were exposed to RoundUp for a substantial period before developing the illness (latency periods matter).
  • Dosage and frequency evidence: Proof that you were exposed to enough glyphosate, often enough, to cause health problems.

Without strong causation evidence, your case will struggle to survive summary judgment or convince a jury.

Evidence of Damages

Finally, for your RoundUp lawsuit to be successful, you must prove damages—the economic and non-economic losses you’ve suffered because of your illness.

Evidence of damages can include:

  • Medical bills: Expenses for treatments, hospitalizations, medications, and ongoing care.
  • Lost income: Pay stubs, tax returns, or employer letters showing how your illness impacted your ability to work.
  • Disability documentation: Proof that your condition caused partial or full disability.
  • Pain and suffering evidence: Testimony, psychological evaluations, or journals detailing how your illness has affected your quality of life.
  • Future damages: Expert projections of future medical expenses, lost earning capacity, and long-term care costs.

The greater your damages—and the better you document them—the more leverage you have during settlement negotiations or at trial.

New Evidence About the Dangers of RoundUp

Research into the dangers of RoundUp is ongoing, and the results are alarming. Staying updated on emerging evidence can help attorneys for RoundUp cases provide the highest level of legal representation to their clients. 

Once recent study investigated the effects of RoundUp on humans, animals, and the environment. Results indicated that glyphosate, the active ingredient in the weedkiller, is a contributing factor in the development of a wide range of medical conditions. Some of these include infertility, autism, obesity, Parkinson’s disease, Alzheimer’s, depression, and cancer. In 2022, glyphosate was found in 80% of urine samples conducted by the CDC. 

Why Hiring the Right Lawyer Matters

RoundUp lawsuits are not DIY projects. Monsanto (now owned by Bayer) has billions to spend on high-powered legal teams and scientific experts. If you try to take legal action without an experienced mass tort lawyer by your side, you’re probably going to lose.

Our experienced RoundUp lawyers will:

  • Gather and organize critical evidence
  • Hire credible medical and scientific experts
  • Handle aggressive defense tactics
  • Build a case designed to withstand the toughest scrutiny
  • Fight for maximum compensation, including punitive damages where appropriate

At Ankin Law in Chicago, we have the resources, experience, and legal firepower to take on massive corporations like Bayer—and win. Our attorneys have recovered hundreds of millions on behalf of our clients. 

Get the Help You Need From Ankin Law

If you or a loved one developed cancer after exposure to RoundUp, time is not on your side. There are strict deadlines (statutes of limitations) that limit how long you have to file a lawsuit. Waiting too long could cause you to lose your right to compensation.

Call Ankin Law at 312-600-0000 for your free consultation and find out if you qualify for a RoundUp lawsuit.

Chicago personal injury and workers’ compensation attorney Howard Ankin has a passion for justice and a relentless commitment to defending injured victims throughout the Chicagoland area. With decades of experience achieving justice on behalf of the people of Chicago, Howard has earned a reputation as a proven leader in and out of the courtroom. Respected by peers and clients alike, Howard’s multifaceted approach to the law and empathetic nature have secured him a spot as an influential figure in the Illinois legal system.

Years of Experience: More than 30 years
Illinois Registration Status: Active
Bar & Court Admissions: Illinois State Bar Association, U.S. District Court, Northern District of Illinois, U.S. District Court, Central District of Illinois
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