International Research Confirms Link Between Glyphosate and Multiple Cancers

A groundbreaking international study, conducted by scientists from Europe and the United States, has provided compelling evidence that even low doses of glyphosate, the most widely used herbicide globally, are associated with the development of various cancers in rats. This comprehensive research involved administering glyphosate and two of its commercial formulations—Roundup BioFlow and Ranger Pro—through drinking water starting from prenatal stages for a duration of two years. Doses used in the study mirrored those deemed safe by current regulatory agencies, including the EU and the U.S.

The results revealed a significant increase in both benign and malignant tumors across multiple organ systems, such as the liver, thyroid, skin, nervous system, reproductive organs, and blood. Notably, both male and female rats showed elevated incidences of rare tumor types like hemangiosarcoma and leukemia, with some cases occurring early in life and leading to premature death. The deaths from leukemia were particularly alarming, as nearly half of these cases occurred before the rats reached one year of age—an effect comparable to early-life cancer in humans.

This study, published in Environmental Health, emphasizes that the doses considered safe for humans today may still pose serious health risks. The findings reinforce the classification of glyphosate by the International Agency for Research on Cancer (IARC) as a probable human carcinogen, aligning with other epidemiological and experimental evidence linking glyphosate to blood cancers and other malignancies.

The research team includes prominent institutions like the Cesare Maltoni Cancer Research Center of the Ramazzini Institute, Boston College, George Mason University, King's College London, and others. Historically, the Ramazzini Institute has been at the forefront of carcinogenic research, investigating agents such as asbestos and benzene.

Furthermore, additional evidence indicates that glyphosate exposure impacts the microbiome and reproductive health, with studies showing adverse effects at doses currently regarded as safe. Prenatal exposure appears particularly harmful, with increased risks of early-life leukemia and developmental toxicity. These findings underscore the urgent need for global regulatory reevaluation and stricter controls on glyphosate usage, especially among pregnant women and children.

In summation, the study highlights the potential carcinogenic and toxic effects of glyphosate at doses previously considered harmless, urging policymakers and health authorities to reconsider current safety standards in light of new scientific evidence. The research underscores the importance of precaution in chemical regulations to protect public health.

Source: https://medicalxpress.com/news/2025-06-international-reveals-glyphosate-weed-killers.html