At a poster session at the annual meeting of the Society for Risk Assessment, 16 experts tasked with reviewing the International Agency for Research on Cancer (IARC) monograph on glyphosate release their evaluation. Along with European and American safety agencies, they could not find evidence for carcinogenesis and instead noted that the Working Group seemed to have exaggerated some studies and even disputed conclusions that were in studies they did use..

“None of the results from a very large database, using different methodologies, provides evidence of, or a potential mechanism for, human carcinogenesis.” The new panel also found that the IARC animal bioassay and genotoxicity evaluations “suffered from significant weaknesses such as: selectivity in the choice of data reviewed, failure to use all relevant biologic information to evaluate relationship to treatment in animal bioassays, and failure to use weight-of-evidence (WOE) evaluations using all available data and appropriate weighting.”

The panel’s findings are consistent with the recent European Food Safety Authority’s (EFSA) conclusion that “glyphosate is unlikely to pose a carcinogenic hazard to humans”; the determination of the Canadian Pest Management Regulatory Agency in April that “the overall weight of evidence indicates that glyphosate is unlikely to pose a human cancer risk”; and a recent statement from the U.S. EPA that a set of 55 epidemiological studies “does not provide evidence to show that glyphosate causes cancer.”