In a striking legal battle, a Louisiana resident has taken on a major agricultural corporation over allegations of negligence and misrepresentation related to the herbicide Roundup. Mary Johnson filed a complaint against Monsanto Company in the United States District Court for the Eastern District of Louisiana on November 17, 2025. The lawsuit accuses Monsanto of wrongful conduct concerning the design, manufacture, and sale of Roundup, which contains glyphosate—a chemical she claims caused her non-Hodgkin’s lymphoma.
The complaint by Mary Johnson, who resides in New Orleans, outlines her exposure to Roundup from 2008 to 2014. She was diagnosed with non-Hodgkin’s lymphoma around 2016. Johnson alleges that Monsanto knew or should have known about the risks associated with glyphosate but failed to provide adequate warnings. The plaintiff argues that Roundup is “defective and dangerous to human health,” lacking proper instructions and warnings about its potential carcinogenic effects. The case highlights studies and evaluations by international bodies like the International Agency for Research on Cancer (IARC), which classified glyphosate as “probably carcinogenic to humans” in 2015.
The lawsuit delves into historical controversies surrounding Monsanto’s practices, including accusations of fraudulent scientific studies used to support the safety of glyphosate products. It references past incidents where laboratories hired by Monsanto were found guilty of falsifying data regarding glyphosate’s safety. Furthermore, it discusses how Monsanto allegedly manipulated public perception through ghostwritten studies and exerted influence over regulatory agencies.
Johnson seeks compensatory damages for her injuries, claiming significant economic and non-economic losses due to medical expenses and diminished quality of life. She also demands punitive damages for what she describes as Monsanto’s reckless disregard for consumer safety. The suit includes multiple counts such as negligence, breach of duty under the Louisiana Products Liability Act (LPLA), manufacturing defects, inadequate warning labels, breach of express warranty, fraud, misrepresentation, and suppression.
Representing Mary Johnson are attorneys whose names are not specified in the document provided. Similarly, details about any defense attorneys or judges involved are absent from this excerpt. The case ID is noted as Case No: 2:25-cv-02326.
Source: 225cv02326_Mary_Johnson_v_Monsanto_Company_Complaint_Eastern_District_of_Louisiana.pdf
