Teratogenic Effects of Glyphosate-Based Herbicides: Divergence of Regulatory Decisions from Scientific Evidence Published in Environmental & Analytical Toxicology by Antoniou et al., J Environ Anal Toxicol 2012, S:4 http://dx.doi.org/10.4172/2161-0525.S4-006

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Teratogenic Effects of Glyphosate-Based Herbicides: Divergence of Regulatory Decisions from Scientific Evidence  Published in Environmental & Analytical Toxicology  by 

Antoniou et al., J Environ Anal Toxicol 2012, S:4 http://dx.doi.org/10.4172/2161-0525.S4-006

Abstract: The publication of a study in 2010, showing that a glyphosate herbicide formulation and glyphosate alone caused malformations in the embryos of Xenopus laevis and chickens through disruption of the retinoic acid signalling pathway, caused scientific and regulatory controversy. Debate centred on the effects of the production and consumption of genetically modified Roundup Ready® soy, which is engineered to tolerate applications of glyphosate herbicide. The study, along with others indicating teratogenic and reproductive effects from glyphosate herbicide exposure, was rebutted by the German Federal Office for Consumer Protection and Food Safety, BVL, as well as in industry-sponsored papers. These rebuttals relied partly on unpublished industry-sponsored studies commissioned for regulatory purposes, which, it was claimed, showed that glyphosate is not a teratogen or reproductive toxin.

However, examination of the German authorities’ draft assessment report on the industry studies, which underlies glyphosate’s EU authorisation, revealed further evidence of glyphosate’s teratogenicity. Many of the malformations found were of the type defined in the scientific literature as associated with retinoic acid teratogenesis. Nevertheless, the German and EU authorities minimized these findings in their assessment and set a potentially unsafe acceptable daily intake (ADI) level for glyphosate. This paper reviews the evidence on the teratogenicity and reproductive toxicity of glyphosate herbicides and concludes that a new and transparent risk assessment needs to be conducted. The new risk assessment must take into account all the data on the toxicity of glyphosate and its commercial formulations, including data generated by independent scientists and published in the peer-reviewed scientific literature, as well as the industry-sponsored studies.

M Antoniou1, MEM Habib2, CV Howard3, RC Jennings4, C Leifert5, RO Nodari6, CJ Robinson7* and J Fagan8*

1Head, Gene Expression and Therapy Group, Department of Medical and Molecular Genetics, King’s College London School of Medicine, UK 2Professor of entomology, former director, Institute of Biology, UNICAMP, and former provost of extension and community affairs, UNICAMP, São Paulo, Brazil 3Professor, Centre for Molecular Biosciences, University of Ulster, Northern Ireland,4Affiliated research scholar, Department of History and Philosophy of Science, University of Cambridge, UK 5Research development professor for ecological agriculture at the University of Newcastle, UK. Interests: director and trustee of the Stockbridge Technology Centre Ltd (STC), UK 6Professor, Center for Agricultural Sciences (department of plant science), Federal University of Santa Catarina, Brazil 7Research director, Earth Open Source, London, UK. Interests: editor, GM Watch, UK 8Director, Earth Open Source. Interests: employed at a GMO testing and certification company