GMW: Scientists condemn retraction of Séralini study
Scientists from around the world have united to condemn the retraction by the editor
of the Elsevier journal Food and Chemical Toxicology (FCT) of the pioneering study
by Prof Séralini’s team on GM maize and Roundup herbicide.
Scientists condemn retraction of Séralini study
www.endsciencecensorship.org, 29 January 2014
* 41 scientists and experts demand reinstatement of the study
* Scientists around the world invited to add their signatures
SCIENTISTS from around the world have united to condemn the retraction[1,2] by
the editor of the Elsevier journal Food and Chemical Toxicology (FCT) of the
pioneering study on genetically modified (GM) maize and Roundup herbicide,
conducted by Prof Gilles-Eric Séralini and his team at the University of Caen,
The study found that rats fed the GM maize and/or low levels of Roundup in their
diet suffered severe organ damage, particularly to the liver, kidneys and
pituitary gland. Additional unexpected observations were higher rates of large
tumours and mortality in most treatment groups.
A group of 41 scientists and biosafety experts have signed a public
statement condemning the retraction as an apparent “act of scientific
censorship” and demanding that the journal reinstate the study, which they say
contains findings of potentially critical importance to public health.
The group is inviting scientists to sign on to the statement, which is hosted at
the new website, endsciencecensorship.org.
On the website, several of the signatory scientists explain the study and its
findings for the non-specialist, as well as providing a detailed examination of
the reasons given for the retraction.
The public is invited to support the initiative by demanding that the German
government release the industry toxicology studies on glyphosate, the main
chemical ingredient of Roundup. Though these studies form the basis of the EU
approval of all glyphosate herbicides, they are kept secret and are held by the
[Comprehensive references to sources are at endsciencecensorship.org]
Séralini’s study passed peer review with minor revisions and was published by
FCT in September 2012. The paper was subjected to a sustained campaign of attack
by pro-GM scientists, many of whom had undisclosed links to the GM crop industry
or with government agencies that had previously approved this or other GM crops
FCT’s editor, Dr A. Wallace Hayes, retracted the paper over a year after it was
published. The decision came after a nontransparent, second review by a panel of
unnamed persons of unknown professional competence and with undisclosed
potential conflicts of interest.
According to the Committee on Publication Ethics (COPE), of which FCT is a
member, retraction of a paper is reserved for cases of misconduct, error,
redundant publication or plagiarism, and unethical research.
None of these criteria apply to the Séralini paper, as Dr Hayes conceded. Dr
Hayes stated that the retraction was solely based on the “inconclusive” nature
of the tumours and mortality outcomes, based on the relatively low number of
animals and the strain of rat used, which is reportedly prone to spontaneous
tumours. Dr Hayes wrote: “No definitive conclusions could be drawn from the
However, the scientists say that the lack of “definitive conclusions” is an
invalid and unprecedented reason for retracting a study, since many scientific
papers contain inconclusive findings.
In addition, the main findings of the Séralini study were severe organ toxicity
in the animals fed GM maize and/or Roundup. Yet these findings, which are
statistically significant and as conclusive as it is possible for such results
to be, have also been erased, due to the presence of some alleged “inconclusive”
findings in the paper.
Just months before the retraction was announced, Dr Richard E. Goodman, a former
Monsanto scientist, was appointed to a newly created editorial position in
biotechnology at FCT. Soon after Goodman’s appointment, a second paper
challenging the safety of GM crop technology was withdrawn from FCT (though
it was immediately re-published in another journal).
In a separate initiative, over 860 scientists worldwide have condemned the
retraction in an open letter to FCT and have announced that they will boycott
Scientists’ comments on the retraction
Dr Angelika Hilbeck, senior scientist, Swiss Federal Institute of
Technology, Institute of Integrative Biology IBZ, Zurich, Switzerland; Chair,
European Network of Scientists for Social and Environmental
Responsibility (ENSSER), said:
“This retraction lacks any scientific basis. If the lack of ‘definitive
conclusions’ were a valid reason for retraction, our libraries would be almost
empty, as I have yet to see a study thatyielded results of ‘definitive’
“In fact, the surprising revelation of FCT’s highly irregular
post-publication evaluation process is that Séralini’s study would appear to be
flawless. In response to massive, orchestrated pressure from industry-aligned
circles, a secret group of unknown people was set up with the sole aim of
finding weaknesses in the study to allow it to be shot down and retracted (we
have no verifiable evidence that these people were experts in the relevant
fields of science or in anything, for that matter). Yet after trying hard for
one full year, all they could come up with was a lack of ‘definitive
“To me, this is a confirmation of the quality of the study and the integrity of
the researchers, as very few studies would pass such an extraordinary evaluation
Dr Michael Antoniou, a molecular geneticist based at a leading London
medical school, said:
“Based on the science presented in the Séralini paper, it is extremely difficult
to see any cause for retraction, especially since the journal’s editor, Dr A.
Wallace Hayes, only highlighted two of several aspects of the paper – the
tumours and mortality rates – as ‘inconclusive’.
“This suggests that even in the editor’s view, the bulk of the findings – the
severe organ toxicity in rats fed GM maize and low levels of Roundup – must be
valid. To retract the whole paper based on the perceived inconclusiveness of
just a proportion of the data presented is scientifically untenable.
“In deciding to retract the paper, the editor is not being true to the science.
I conclude that the retraction must be due to other, non-scientific reasons.”
Dr David Schubert, professor, Salk Institute for Biological Studies, CA, USA,
“The editor of the journal claimed that the reason for retraction of the
Séralini study was that ‘no definitive conclusions can be reached’. As a
scientist, I can assure you that if this were a valid reason for retracting a
publication, a large fraction of the scientific literature would not exist.
“Before the retraction, a former Monsanto scientist was brought into the journal
as biotechnology editor. Therefore, a combination of intense pressure from
scientists and a new pro-industry editor led to the elimination of an
exceptionally important study.
“I am convinced that there is significant evidence, like that presented by
Séralini, that some GM foods are hazardous to human health. In order for data
supporting this possibility to enter public discourse, scientists must place
their ethical responsibilities above corporate profits and cease their continual
assault on the science relating to GM safety. The protection of scientists’
right to publish their findings without censorship or retribution must be
1. Hayes AW (2013). Elsevier (2013). Elsevier announces article retraction from
Journal Food and Chemical Toxicology. 28 November.
2. Hayes AW (2013). Letter to Prof GE Séralini. 19 Nov. Available at:
3. Séralini GE et al (2012). Long term toxicity of a Roundup herbicide and a
Roundup-tolerant genetically modified maize. Food and Chemical Toxicology
50(11): 4221-4231 [WITHDRAWN]. The study is available here: http://gmoseralini.org/wp-content/uploads/2012/11/GES-final-study-19.9.121.pdf
5. Public petition at: http://bit.ly/1aERr6B Prof Séralini has already released
the raw data for his study to the editor of FCT, who reported that he found
nothing “incorrect” about the results and no evidence of fraud
(http://www.gmwatch.org/files/Letter_AWHayes_GES.pdf). Prof Séralini has also
deposited his raw data with a notary, for public release as soon as government
authorities make public all industry data on pesticides and GMOs.
Industry data on GMOs is already available on request from EFSA, though not in
an analyzable form (Excel/Word).
6. Hayes AW (2013). Letter to Professor GE Séralini. 19 Nov. Available at:
7. Hayes AW (2013). Food and Chemical Toxicology editor-in-chief, A. Wallace
Hayes, publishes response to Letters to the Editors. 10 Dec.
8. Mezzomo BP et al (2012). WITHDRAWN: Effects of oral administration of
Bacillus thuringiensis as spore-crystal strains Cry1Aa, Cry1Ab, Cry1Ac or Cry2Aa
on hematologic and genotoxic endpoints of Swiss albino mice. Food Chem Toxicol.
9. Mezzomo BP et al (2013). Hematotoxicity of Bacillus thuringiensis as
spore-crystal strains Cry1Aa, Cry1Ab, Cry1Ac or Cry2Aa in Swiss albino mice. J
Hematol Thromb Dis 1(1).
Contact in the first instance: Claire Robinson (coordinator)