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GMO Study: Rats Fed Lifetime of GM Develop Mass Tumors, Die Early

Anthony Gucciardi
September 19th, 2012
Updated 10/01/2014 at 2:12 pm
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gmostudy 235x147 GMO Study: Rats Fed Lifetime of GM Develop Mass Tumors, Die Early

A new GMO study may very well change the way that the world looks at GMOs once and for all. Complete with shocking and very disturbing photos of rats with tumors larger than a golf ball in size, a new French GMO study has concluded that rats fed a lifelong diet consisting of Roundup-containing genetically modified corn suffered serious consequences. While the onset of tumors was the most obvious and damaging effect, the researchers reveal that the rats also received heavy amounts of damage to multiple organs.

As a result of the mass tumors, liver and kidney damage, it was concluded that around 50% of the males and 70% of the females died prematurely as a result of eating only Roundup tolerant seed or drinking water with Roundup as approved levels set by the United States government. In comparison, only 30% of males and 20% of females died prematurely while consuming traditional alternatives. The San Francisco Chronicle rightly states that the study ‘rocks the GMO debate’.

The news comes just days after France decided to ban the last remaining GMO currently allowed in Europe, Monsanto’s GM maize crop.

The study is now under assault by pro-GMO scientists and corporations despite being labeled “the most thorough research ever published into the health effects of GM food crops and the herbicide Roundup on rats.” It also happens that this is actually the first study to examine the key aspect of lifelong GMO consumption and its effects. You may be surprised to hear this, as it seems logical that one would be done before GMOs were unleashed on the public.

Unfortunately, Monsanto and other GMO companies do their absolute best to prohibit the full study of GM products in many cases through the use of patent protection laws and other legal red tape. French researchers were likely able to avoid many of these issues by being out of the United States. And as you can imagine, the pictures alone from this study are very telling. Monsanto and other vested biotech organizations are simply not happy that this has gotten out.

gmostudyrat 410x239 GMO Study: Rats Fed Lifetime of GM Develop Mass Tumors, Die Early

Led by Gilles-Eric Seralini of the University of Caen in France, Seralini and his colleagues used a Monsanto seed variety known as NK603. Made tolerant to the company’s own Roundup, an herbicide linked to DNA damage and infertility, researchers say the consumption of the GMO crops ultimately led to mammary tumors and severe damage to the liver and kidney. As researcher and molecular biologist Dr. Michael Antoniou explained, even the scientists themselves were shocked by the aggressive tumor development:

“This research shows an extraordinary number of tumors developing earlier and more aggressively – particularly in female animals. I am shocked by the extreme negative health impacts,” he said.

The study was published in The Food & Chemical Toxicology Journal and presented in London during a news conference. Titled “A Comparison of the Effects of Three GM Corn Varieties on Mammalian Health,” you can view the study abstract for yourself at the International Journal of Biological Sciences website.

It is already known that genetically altering the very makeup of an organism is problematic, with no real knowledge of the true long-term effects (over decades) that may occur even beyond the short term damages that we are aware of. It is essential that not only are GMOs labeled around the world for public consumption, but ultimately banned. Over time, the food supply will continually be engulfed with genetically modified strains with the very real threat of contamination. Studies like these show a more graphic side of the debate, which many are not ready to accept.

About Anthony Gucciardi:
1.thumbnail GMO Study: Rats Fed Lifetime of GM Develop Mass Tumors, Die EarlyGoogle Plus ProfileAnthony is the Editor of NaturalSociety whose work has been read by millions worldwide and is routinely featured on major alternative and mainstream news website alike, including the powerful Drudge Report, NaturalNews, Daily Mail, and many others. Anthony has appeared on programs like Russia Today (RT), Savage Nation, The Alex Jones Show, Coast to Coast AM, and many others. Anthony is also dedicated to aiding various non-profit organizations focused around health and rehabilitation as well as the creator of the independent political website Storyleak

From around the web:

  • disqus_4QILcqf28h

    Fortunately this paper has been withdrawn as being scientifically

  • Yūgen

    Shill ^

  • Debunking
  • Sara

    Just saying, I have a photo from right this second, on this page, advertising round up pesticide…

  • Filmari Evenimente

    50% of the males and 70% of the females died prematurely as a result of eating only Roundup tolerant seed or drinking water with Roundup as approved levels set by the United States government …

    OMG thats a shame…

  • Radu Cristian

    I dont like the way those mice turned out…

  • Judith Persin

    Unfortunately, there are people on this blog who do not do any research and they condemn the rest of us who do. I have been studying GMOs for over three years since l learned without a doubt that they make me very ill. It is an outright lie that GMOs are going to feed the world! They destroy the soils and are full of toxic poisons; and if not stopped, they will eventually destroy the human race. You who disagree may go on eating them. Have yourself a big glass of Roundup on the rocks! But don't invite the rest of us to drink and dine with you. And maybe you should ask your doctor "if cancer is right for you too"!
    Call drinking and eating poisons science if that floats your boat. However, when you condemn the rest of us who have done the research and know what we are talking about, all you do is make yourselves look like the uninformed idiots that you are.
    Judith A. Persin, RN

  • Jerrold Milstein

    A lack of scientific evidence has not failed to keep alarmist comments and stories from publication. While the photos shown are disturbing, they are just examples of dishonest reporting. Credible reports in peer reviewed journals will provide more than examples. What you see here is publication of the numerator and not the denominator as well as the statistical evidence of effect.

    Another point to be made has to do with population and the necessity to feed the world. Fish like the "frankenfish" provide more protein than the wild stocks. Aside from regulations, it has not been shown that they will supplant the native stocks. Crops from GM seeds will also provide more food for our insatiable appetites.

  • Will

    My Gucciardi,

    You are obviously trying to do good by publishing this article, but it is not very helpful to spread fear amongst the ill-educated masses.

    As you can see from the comments, some (perhaps many) don't even know what a GMO is and just concentrate on the anti-capitalist viewpoints of GM (A point even most scientists struggle with). However, this viewpoint, where potentially valid, isn't the scientific one that your article offers.

    The timing of your article was unfortunate as the EFSA (not owned or funded by the apparent devil Monsanto or anyone else for that matter) today published their findings of the report stating "Serious defects in the design and methodology of a paper by Séralini et al. mean it does not meet acceptable scientific standards"

    I agree with the first poster, "It’s a shame and immoral that this story will be reported and all the anti-GMO propaganda will continue to be furthered".

    Read more:

    We need to wake up and stop spreading fear and intolerance on what is starting to prove to be a very successful tool in achieving global food security.

  • Brett

    It's a shame and immoral that this story will be reported and all the anti-GMO propaganda will continue to be furthered, but they will not post a single update or follow-up to the story that shows that pretty much the whole of the scientific community is showing how this study is pretty useless due to flawed methodologies and terrible statistical analysis. Also not reported is how Seralini has a history of conducting flawed and biased anti-GMO studies that are over and over again shown to be manipulating results to meet his pre-determined conclusion.

    But again, you'll never see any of that reported by the anti-GMO propaganda machine since it shows their agenda is based not in science but only in fear-mongering and pandering to the uneducated public's lack of understand (because science is hard darnit!) and feeling that "the man" is out to get them. It's one big circle jerk of confirmation bias. Shameful.

    • Shill Alarm

      That's right Brett…we should tell all those parents to keep on feeding their children whatever the Agra/Military Complex wants them to eat. Nothing to see here folks, move along.

      Take your vaccines, drink that fluoride and lay yourselves on the sacrificial pyre of the Scientific Priest class working on behalf of the overlords.

  • Emerson White

    This study was a fraud, you should mention that.

    • Shill Alarm

      Hey Emerson….Perverting the course of 'science' is the name of the game and Genocide is the ultimate aim of Genetically Modified Organisms. They are using humans as test subjects which cannot be denied and for what? We already have safe

      alternatives…real food tried and tested from the beginning of time. A key technique used to attack the species of this earth is the manipulation of data behind the curtain. The corrupted 'Scientists' are the priest class…tricking the masses with smoke, mirrors and manipulated 'studies'.


    The results of the experiments clearly show the dangers hidden in the long term ingestion of unfermented genetically modified grains. It will be useful to examine also the long term ingestion of unfermented grains e.g. maize, soya bean, cotton seed, wheat, etc. There are many stories in history on how the ingestion of large quantities of unfermented grains caused skin diseases and tumors. The outbreak of pellagra in southern part of the USA during the early years of the 20th Century illustrates. The legend of St Jerome (340 t0 420 AD) is also an example.

    The unfermented grains contain polyunsaturated fatty acids which various studies suspect as a major factor in the many diseases associated with tumors, viral/fungal diseases and formation of plaques.

    We must be grateful for the French scientists bringing out these results of the studies on genetically modified grains to the public domain. We are waiting for the suppressed scientific evidence on the harm being caused by polyunsaturated fatty acids through the formation of prostaglandins in the body and ingestion of unfermented grains to be brought to the public domain too.

  • Klaus

    Many commenters here seem more concerned about the rats in this study than the millions of human beings already being fed the very same products as the rats.

    I agree that there are ethical issues with the use of test animals. However, in this case what the animals were subjected to was nothing other than what we humans have already been eating for years. Cutting the tests "prematurely" would of course be a sympathetic course of action, but would obviously give Monsanto an advantage in the legal/scientific controversy.

    Don't let emotions blur your judgment. I myself cried when I saw the pictures of the rats. Did I cry for the rats? Well, the rats too, but it was more about the big picture – the total lack of ethics demonstrated by Monsanto, with potentially disastrous health effects on humanity at large…

    • Klaus


      Rat ethics aside, things seem less clear-cut when one reads other takes on this story. And where is the source? The article referred to above dates back from 2009 and is NOT the life-long experiment (only 90 days).

      I'm still very much concerned about the moral and ethic standards of Monsanto et al., but I'm no longer sure this story has enough substance…

      • Shill Alarm

        Where there is smoke there is fire. If a person has

        any common sense or logic at all, would it seem a good

        idea to risk the health of the planet on corporate greed?

        We already had perfectly healthy food before this unfortunate and ill advised story of the GMO began. By the time the long term studies are in it will be too late. OOPS!

  • blakmira

    Any idiot knows that if you're fed poison, you're going to get sick and probably wind up with tumors. But this is pure evil — GMs being forced on people and experiments being forced on animals. What sort of human being would inflict such pain and suffering on other sentient beings? There's hundreds of ways to test poisons other than using other sentient beings.

    So this is Natural Society? What a joke.

    • Sarah

      I completely agree, Blakmira. We're far beyond the point of needing to test on animals. Its cruel and incredibly hard to watch!!!

  • Anonymous

    Big difference between GMO and roundup. My bet is that this is caused by roundup and not the GMO – mediocre scientific study and mediocre journalism at best.

    • David Ellul

      You do get, understand, that Monsanto's GM soy and corn actually create their own pesticide that is present throughout, and that they are highly resistant to Roundup and that's a large part of their reason for being.

    • Michael Kinney (not

      Hey anonymous. Not mediocre science or journalism. The ROUNDUP is IN the GMOs. That's what GMOs are. Seeds with Roundup inside the genetic makeup so spraying is not needed. However, the problem is that you CAN'T wash it off. You MUST eat it if you eat the produce from their seeds which they are forcing on everyone via lawsuits and such. A completely different subject that could be discussed for hours on end.

      • Grant Smith

        Actually the Roundup (glyphosphate) is only sprayed on the crop, it is not produced by the corn/soybeans. You are on the right track however, some Monsanto corn produces a toxin known as BT (bacillus thuringiensis) to fend off European corn borer. It's easy to get confused with all of the different types of GM crop out there and I'm not trying to be a troll. I personally wouldn't consume either type of GM corn, given that there is plenty of non-GM corn on the market and it's safety has been proven over millenia.

        • Jonathan

          Thanks Grant, well said: Roundup is an herbicide; why would anyone put an herbicide into an herb!? BT GMO's are highly specific: they target the internal skin of insects which is not homologous to our skin or mucous membrane, so the chance that BT crops would harm humans is really small.

          However the idea that we have been eating modern corn for millenia is wrong: Native Americans have been eating many varieties of corn for the past couple millenia. The rest of us are only recently exposed to corn in our diets, and that corn is highly modified and hybridized, not for nutrition but for size, timing, or sugars.

      • Anonymous

        No, Roundup is NOT inside the GMO. Look up the facts! The GMO part of things is that there is a gene in the plant that makes it resistant to Roundup. This whole study is a joke! Humans do NOT eat GMO corn — this is field corn for livestock, not sweet corn for humans. And, Roundup is nEVER used in human water supply. Duh! No wonder they developed tumors!

        • Carol

          Yes, it is field corn for livestock, and then humans consume that livestock.

        • bluebird

          Hi. I received an email this year from pesticide action network advising me that GM corn is being sold in Ontario, Canada (yes,for human consumption). FYI

        • OrganicEnthusiast

          Uhm GMO corn is in almost every processed food out there that is created for human consumption. So yes we humans ARE eating GMO corn. Also, Roundup Ready is in our water supply because when farmers readily apply it to their monocrops of corn, soy, etc., that herbicide drains into the soil and off with the irrigation into our entire water supply.

    • OrganicEnthusiast

      Yes, however farmers apply more Roundup Ready on GMO crops because both are created by Monsanto and because of that, Monsanto encourages farmers to spray more herbicides on the plants as opposed to the pesticides.

  • Anonymous

    Poor rats, now the humans are rats!

    • Bart B

      It is a very scientific debate, not as simple , and apparently the researchers published in 2009 ( so it 's not a NEW GMO study) didn't follow basic scientific rules such as using correct statistical analysis …so relying on this article is maybe not such a good idea…

      Please have a look on :

  • Anonymous

    Prepare for the MSM to attack this like no tomorrow to defend Monsanto.

    • jj

      Yes, I agree

    • Brett

      Prepare for the scientific community to show how completely flawed and agenda-driven this study is and have none of the anti-GMO nutter sites ever let you in on that little secret. But hey, keep fighting the man with your head in the sand!

      • Anonymous

        What? Why would they be agenda driven they just don’t want their food owned by a monopoly…

  • Anonymous

    Disgusting and horrifying that anyone is eating this.

  • Jack H.

    This is extremely, extremely disturbing. I remember reading about a harmful ingredient (can't remember which one) triggering tumors that big, but seeing pictures and seeing it was caused by GMOs is absolutely terrible.

    I pray for CA's prop 37 to pass

    • Anonymous

      Agreed we need to continue pushing for Prop 37 to fight this scum.

      • Anonymous

        What I find the hardest to believe is that anyone doing research with these animals would ever let those tumors get that big! There is absolutely no reason for it and is inhumane. Tumor size should not be an indicator that something is bad, the fact that they developed one should be enough and the experiment should have been terminated long before the tumors reached that size!

        • Sarah


        • Blackhaired

          But the amount of days for experiment is previous established!