The Scientific Evidence Justifies Banning Glyphosate
The primary scientific study pesticide regulators worldwide used to justify the approval of Glyphosate, the active ingredient in Roundup and many other herbicides, has been retracted due to fraud.
This study, by Gary Williams, Robert Kroes, and Ian Munro, was used to cast doubt on the numerous published studies showing that Glyphosate caused cancers and many other diseases.
Researchers Alexander A. Kauro and Naomi Oreskes published a study in Environmental Science and Policy that identified multiple flaws in the Williams paper, including the fact that it was ghostwritten by Monsanto employees, which constitutes academic fraud. The Williams paper used unpublished studies from Monsanto and ignored a large number of scientific studies showing the multiple diseases Glyphosate causes, including cancer.
This paper was cited and used by regulators as the basis for approving the use of glyphosate-based pesticides and overriding the evidence presented in hundreds of studies showing the immense harm caused by them to human health and the environment.
This retraction comes a few months after the landmark study on glyphosate by Panzacchi et al. was published on June 10, 2025, examining total lifetime exposure to the so-called ‘safe’ levels to which most people are subjected [2].
The study found that the lowest dose of 0.5 mg/kg, which is four times lower than the US Environmental Protection Agency’s (EPA) proposed ‘safe’ level, caused increased rates of both benign and malignant tumors in various parts of the body compared to the controls. These tumors included leukemia, skin, liver, thyroid, nervous system, ovary, mammary gland, adrenal glands, kidney, urinary bladder, bone, endocrine system, pancreas, uterus, and spleen. [2,3]
Now that William’s study has been retracted, the main reason for trusting the safety of glyphosate-based herbicides has disappeared, leaving no reason to avoid banning these highly toxic poisons that pollute nearly every part of the environment and the bodies of most living creatures, especially us and our children
There are an enormous number of published scientific studies showing that glyphosate-based pesticides are responsible for multiple serious health problems for people, animals, and the wider environment.
The widespread adoption of GMO crops in the U.S. has resulted in a massive increase in the application of glyphosate, the active ingredient in Roundup, as the primary method of weed control. [4]
The Panzacchi study confirms evidence from earlier research, including that by the IARC and Seralini et al., among many others[5,6]. It also validates the accuracy of “Genetically engineered crops, glyphosate and the deterioration of health in the United States of America,” where Dr. Nancy Swanson, our co-authors, and I demonstrated how glyphosate and GMOs are linked to over 20 chronic diseases in the U.S [4].

The First Credible Peer-reviewed Lifetime Study of GMOs and Roundup
Until Panzacchi et al. was published, there was only one credible, independent, non-industry funded, peer-reviewed lifetime feeding study of GMOs and Roundup. It found that mammary and other tumors, liver and kidney damage result from regular exposure to minute amounts of Roundup and/or a diet containing GMO corn, similar to the typical exposures people get from food. [6]
The image above shows a rat with large mammary tumors caused by consuming glyphosate at the usual levels found in food. The tumors on the right-hand side, starting from the top, are caused by eating GMO corn, GMO corn treated with Roundup, or just Roundup. (Seralini et al.)
All female rats in the study that were fed GMOs and/or Roundup (Treated Group) developed mammary tumors and died earlier than the rats fed non-GMO food without Roundup (Control Group), except for one rat that died early from an ovarian tumor. This finding aligns with Thongprakaisang et al., showing that glyphosate promotes the growth of human breast cancer cells via estrogen receptors. [7]
Treated males presented four times the number of tumors that were large enough to be felt by hand than the controls, and these occurred up to six hundred days earlier.
The International Agency for Research on Cancer (IARC)
The International Agency for Research on Cancer (IARC) has assigned glyphosate a Group 2A rating for Cancer, the second-highest classification. [5]
This means it causes cancer in animals and has some evidence of causing cancer in humans, most notably non-Hodgkin lymphoma.

A study by Flower et al. examined the levels of cancer in children whose parents used glyphosate for weed control. They found that these children had increased levels of all childhood cancers, including all lymphomas, such as non-Hodgkin lymphoma.[8]
A case-controlled study by Swedish scientists Lennart Hardell and Mikael Eriksson also linked non-Hodgkin lymphoma to exposure to various pesticides and herbicides, including glyphosate. [9] The link between glyphosate and non-Hodgkin lymphoma has resulted in significant court cases, most of which Bayer-Monsanto has lost and awarded millions of dollars to the victims.
Genetically engineered crops, glyphosate, and the deterioration of health in the United States of America
Dr. Nancy Swanson and I, along with our co-authors Jon Abrahamson and Bradley Wallet, published a peer-reviewed paper, “Genetically engineered crops, glyphosate, and the deterioration of health in the United States of America,” showing how glyphosate and GMOs are linked to over 20 diseases in the U.S. The study searched US government databases for genetically engineered crop data, glyphosate application data, and disease epidemiological data. This was correlated with numerous diseases linked to the increased use of glyphosate and GMOs. A standard accepted statistical analysis showed that the odds of glyphosate and GMOs not being the cause of these diseases was 10,000 to 1. On top of these, numerous studies are confirming the link between GMOs and glyphosate with these diseases. [4]
We compiled this data into graphs demonstrating the rise in diseases, glyphosate, and GMOs. We also included green trend lines to illustrate that these increases are linked to the growing use of genetically engineered (GE) corn and soy, along with glyphosate.
Correlations with Cancer
We found strong correlations for cancers of the liver, kidney, thyroid, and pancreas, as well as deaths from acute myeloid leukemia. These correlations have now been confirmed by Panzacchi et al., who demonstrated that small levels of glyphosate and glyphosate herbicides cause these issues in rats.
Thyroid cancer, in particular, appears to be linked to the introduction of GE crops and the use of glyphosate. It seems to affect women more, while men are more susceptible to liver and kidney cancers.

Conclusion
Research shows glyphosate-based herbicides cause multiple serious chronic diseases. Over 50 years of regulation since glyphosate’s introduction in 1974 clearly highlight regulatory failure. Authorities should fulfill their duty to protect the public by banning these substances.
References
- Alexander A. Kaurov and Naomi Oreskes, The afterlife of a ghost-written paper: How corporate authorship shaped two decades of glyphosate safety discourse, Environmental Science and Policy 171 (2025) 104160
- Panzacchi, S., Tibaldi, E., De Angelis, L. et al. Carcinogenic effects of long-term exposure from prenatal life to glyphosate and glyphosate-based herbicides in Sprague–Dawley rats. Environ Health 24, 36 (2025). https://doi.org/10.1186/s12940-025-01187-2
- EPA R.E.D. FACTS Glyphosate, https://www3.epa.gov/pesticides/chem_search/reg_actions/reregistration/fs_PC-417300_1-Sep-93.pdf
- Nancy L. Swanson, Andre Leu, Jon Abrahamson, and Bradley Wallet, Genetically engineered crops, glyphosate and the deterioration of health in the United States of America, Journal of Organic Systems, 9(2), 2014
- “Glyphosate,” IARC Monographs–112, http://monographs.iarc.fr/ENG/Monographs/\vol112/mono112-02.pdf.
- Gilles-Éric Séralini et al., “Long-Term Toxicity of a Roundup Herbicide and a Roundup-Tolerant Genetically Modified Maize, Environmental Sciences Europe, republished study (2014): 14.
- Thongprakaisang, S., Thiantanawat, A., Rangkadilok, N., Suriyo, T. and Satayavivad, J., 2013, Glyphosate induces human breast cancer cells growth via estrogen receptors, Food and Chemical Toxicology, 59: 129-136.
- K. B. Flower, J. A. Hoppin, C. F. Lynch, A. Blair, C. Knott, D. L. Shore, et al., “Cancer Risk and Parental Pesticide Application in Children of Agricultural Health Study Participants,” Environmental Health Perspectives 112, no. 5 (2004): 631–35.
- Lennart Hardell and Mikael Eriksson, “A Case-Control Study of Non-Hodgkin Lymphoma and Exposure to Pesticides,” Cancer 85, no. 6 (March 15, 1999): 1353–60.