Health Concerns with the World's Most Widely Used Herbicide: Glyphosate

This comprehensive health review synthesized the rapidly growing body of peer-reviewed literature on the health effects of glyphosate, which has become the most heavily applied pesticide in history. Since the introduction of glyphosate-tolerant genetically modified crops in 1996, global glyphosate use has increased approximately 15-fold.

The review documented evidence linking glyphosate exposure to cancer (particularly non-Hodgkin lymphoma), endocrine disruption, reproductive toxicity, neurotoxicity, liver and kidney damage, and gut microbiome disruption. A major focus was the distinction between pure glyphosate and commercial formulations, which contain adjuvants that dramatically increase toxicity.

The authors argued that regulatory safety assessments based solely on pure glyphosate are scientifically inadequate and fail to protect public health. The WHO's International Agency for Research on Cancer (IARC) classified glyphosate as 'probably carcinogenic to humans' (Group 2A) in 2015.

Key Findings

• •Global glyphosate use has increased approximately 15-fold since the introduction of GMO crops in 1996.
• •Independent studies consistently show health effects including cancer, endocrine disruption, and organ damage at relevant exposure levels.
• •Commercial glyphosate formulations are significantly more toxic than pure glyphosate, yet regulations are based on pure glyphosate testing.
• •IARC classified glyphosate as 'probably carcinogenic to humans' (Group 2A) in 2015.
• •Regulatory safety reviews have been criticized for relying heavily on unpublished industry-funded studies.

Methodology

Systematic literature review of peer-reviewed studies published in indexed scientific journals through 2017. The review encompassed animal studies, in vitro research, epidemiological investigations, and mechanistic analyses. Studies were evaluated for methodological rigor and relevance to human health risk assessment.

Why This Matters for Families

This review makes clear that the scientific evidence against glyphosate safety is overwhelming. Families should not be reassured by regulatory agency pronouncements that glyphosate is safe, as these assessments are based on industry data and outdated testing of pure glyphosate rather than real-world formulations. Choosing certified organic foods is the most protective action families can take.