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Organic Consumers Association

Major Study: Monsanto GMO Corn Can Cause Damage to Liver and Kidneys, and Severe Hormonal Disruption

For related articles and information, please visit OCA's Genetic Engineering page, Millions Against Monsanto page and our Health Issues page.


A scientific study that identified serious health impacts on rats fed on 'Roundup ready' GMO maize has been republished following its controversial retraction under strong commercial pressure. Now regulators must respond and review GMO and agro-chemical licenses, and licensing procedures.

A highly controversial paper by Prof Gilles-Eric Séralini and colleagues has been republished after a stringent peer review process.

The chronic toxicity study examines the health impacts on rats of eating  a commercialized genetically modified (GM) maize, Monsanto's NK603 glyphosate-based herbicide Roundup.

The original study, published in Food and Chemical Toxicology (FCT) in September 2012, found severe liver and kidney damage and hormonal disturbances in rats fed the GM maize and low levels of Roundup that are below those permitted in drinking water in the EU.

However it was retracted by the editor-in-chief of the Journal in November 2013 after a sustained campaign of criticism and defamation by pro-GMO scientists.

Toxic effects were found from the GM maize tested alone, as well as from Roundup tested alone and together with the maize. Additional unexpected findings were higher rates of large tumours and mortality in most treatment groups.

Criticisms addressed in the new version

Now the study has been republished by Environmental Sciences Europe. The republished version contains extra material addressing criticisms of the original publication.

The raw data underlying the study's findings are also published - unlike the raw data for the industry studies that underlie regulatory approvals of Roundup, which are kept secret. However, the new paper presents the same results as before and the conclusions are unchanged.

The republication restores the study to the peer-reviewed literature so that it can be consulted and built upon by other scientists.

The republished study is accompanied by a separate commentary by Prof Séralini's team (also published on The Ecologist) describing the lobbying efforts of GMO crop supporters to force the editor of FCT to retract the original publication.

The authors explain that the retraction was "a historic example of conflicts of interest in the scientific assessments of products commercialized worldwide."

"We also show that the decision to retract cannot be rationalized on any discernible scientific or ethical grounds. Censorship of research into health risks undermines the value and the credibility of science; thus, we republish our paper."    


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