How many cancers caused by Roundup
You could have asked Grok with the same amount of effort it to took to ask me.
The “Wikipedia” article on Glyphosate is actually well documented with various study information (unlike some “Wiki” articles”):
https://en.wikipedia.org/wiki/Glyphosate
Wiki:
“There is broad agreement among national pesticide regulatory agencies and scientific organizations that labeled uses of glyphosate have demonstrated no evidence of human carcinogenicity.”
“Although some small studies have suggested an association between glyphosate and non-Hodgkin lymphoma, subsequent work confirmed the likelihood this work suffered from bias, and the association could not be demonstrated in more robust studies”
The “half-life” of Glyphosate in soil is 3-130 days:
https://www.pomais.com/how-long-does-glyphosate-stay-in-the-soil/
I get mine {concentrate generic version} at “Tractor Supply”....much cheaper! (I have 14 acres of weed/poison oak control to take care of...along driveways & near buildings mostly for wildfire prevention....a lot less “weed eatering” that way!)
I am switching to this next year...even less work...works multiple seasons:
https://www.tractorsupply.com/tsc/product/rm43-glyphosate-plus-weed-preventer-tvc-1-gal-1055610
Use gloves when mixing the Glyphosate concentrate and don’t spray on windy days and you will be just fine.
Your answer:
Via Grok:
There is no precise, definitive number of cancers directly “caused” by Roundup (glyphosate-based herbicides), as establishing causation for individual cases or population-level totals is scientifically complex and contested.
Scientific Context
IARC (WHO) classification (2015): Glyphosate is “probably carcinogenic to humans” (Group 2A), based on limited evidence in humans (mainly associations with non-Hodgkin lymphoma, or NHL), sufficient evidence in animal studies, and strong mechanistic evidence (e.g., genotoxicity/DNA damage). This is the main basis for concerns.
Counter views from regulators: The U.S. EPA, European agencies (EFSA, etc.), and some large studies (e.g., Agricultural Health Study of ~54,000 applicators) conclude glyphosate is “not likely carcinogenic” to humans, with no clear overall association for NHL or most cancers in key prospective data.
Key studies on risk: A 2019 meta-analysis found high glyphosate exposure linked to ~41% increased relative risk of NHL. Other analyses show mixed or no consistent links across all cancers. Relative risk increases apply mainly to high/occupational exposure (e.g., farmers/applicators) and do not translate directly to absolute numbers of cases.
Population attributable risk estimates are not well-established or widely agreed upon due to these debates, confounding factors (other pesticides, lifestyle, etc.), and varying exposure levels. Billions of people have indirect/low exposure via food/residues, but strong evidence ties risks primarily to heavy, prolonged use.
Legal/Claims Perspective
Hundreds of thousands of people have alleged their cancers (overwhelmingly NHL and related blood cancers) were caused by Roundup:
~165,000–170,000 lawsuits filed against Monsanto/Bayer as of recent years.
Bayer (which acquired Monsanto) has settled over 100,000 claims for roughly $11 billion total (including earlier global resolutions and a proposed new ~$7.25 billion class settlement in 2026 for current/future claims).
Many individual verdicts have favored plaintiffs (sometimes hundreds of millions each), though appeals and Supreme Court rulings (e.g., recent decisions limiting some claims) continue. Settlements are not admissions of causation or liability by Bayer, which maintains the science shows no cancer link.
These numbers reflect alleged or legally resolved cases among users (mostly heavy occupational exposure), not a verified scientific count of causation. New cases continue as diagnoses emerge.
Bottom Line
No exact tally exists because cancer has many causes, and glyphosate’s contribution (if any) is probabilistic, dose-dependent, and debated. Most experts agree any elevated risk is modest and relevant mainly for high-exposure groups.
If you or someone you know used Roundup extensively and developed NHL or a related cancer, consult a doctor for medical advice and consider speaking with a lawyer about potential claims (statutes of limitations apply).
For the latest science, refer to IARC, EPA reviews, or major cohort studies rather than litigation-driven narratives alone.
The controversy remains active in courts, science, and policy as of 2026.
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So they don’t know, but there is no clear evidence that it does in any but very high exposures
none
>> How many cancers caused by Roundup
You tell us! SHOW YOUR WORK.
They have no cases where a cancer was positively connected to its cause.