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GMOs: Genetically Modified Foods
Risks and Dangers of GMOs

Dear friends,

GMOs: Risks, Dangers of Genetically Modified Foods

Jeffrey M. Smith, the most well-known researcher of genetically modified organisms (GMOs) and foods, has written the definitive exposé on the grave risks and dangers of GMOs in his engaging book Seeds of Deception. This is one of very few books that have the potential to awake the general public to grave risks and dangers of GMOs. It is both a fascinating read and very well documented.

For an excellent 10-page summary of the book, click here. Below is a shorter article in which Mr. Smith which reveals the depth and severity of this huge health risk. Please help to spread this vital news far and wide.

With best wishes for an awakened public,
Fred Burks for PEERS and

Genetically Engineered Foods (GMOs) May Pose National Health Risk
By Jeffrey M. Smith

In a study in the early 1990's rats were fed genetically modified (GM) tomatoes. Well actually, the rats refused to eat them. They were force-fed. Several of the rats developed stomach lesions and seven out of forty died within two weeks. [1] Scientists at the FDA who reviewed the study agreed that it did not provide a "demonstration of reasonable certainty of no harm." In fact, agency scientists warned that GM foods in general might create unpredicted allergies, toxins, antibiotic resistant diseases, and nutritional problems.

Internal FDA memos made public from a lawsuit reveal that the scientists urged their superiors to require long-term safety testing to catch these hard-to-detect side effects. [2] But FDA political appointees, including a former attorney for Monsanto in charge of policy, ignored the scientists' warnings. The FDA does not require safety studies. Instead, if the makers of the GM foods claim that they are safe, the agency has no further questions. The GM tomato was approved in 1994.

According to a July 27, 2004 report from the US National Academy of Sciences (NAS), [3] the current system of blanket approval of GM foods by the FDA might not detect "unintended changes in the composition of the food." The process of gene insertion, according to the NAS, could damage the host's DNA with unpredicted consequences. The Indian Council of Medical Research (ICMR), which released its findings a few days earlier, identified a long list of potentially dangerous side effects from GM foods that are not being evaluated. The ICMR called for a complete overhaul of existing regulations. [4]

The safety studies conducted by the biotech industry are often dismissed by critics as superficial and designed to avoid finding problems. Tragically, scientists who voice their criticism, as well as those who have discovered incriminating evidence, have been threatened, stripped of responsibilities, denied funding or tenure, or fired. [5]

For example, a UK government-funded study demonstrated that rats fed a GM potato developed potentially pre-cancerous cell growth, [6] damaged immune systems, partial atrophy of the liver, and inhibited development of their brains, livers and testicles. [7] When the lead scientist went public with his concerns, he was promptly fired from his job after 35 years and silenced with threats of a lawsuit.

Americans eat genetically modified foods everyday. Although the GM tomato has been taken off the market, millions of acres of soy, corn, canola, and cotton have had foreign genes inserted into their DNA. The new genes allow the crops to survive applications of herbicide, create their own pesticide, or both. While there are only a handful of published animal safety studies, mounting evidence, which needs to be followed up, suggests that these foods are not safe.

Rats fed GM corn had problems with blood cell, kidney and liver formation. [8] Mice fed GM soy had problems with liver cell formation [9] and pancreatic function [10], and the livers of rats fed GM canola were heavier. [11] Pigs fed GM corn on several Midwest farms developed false pregnancies or sterility. [12] Cows fed GM corn in Germany died mysteriously. And twice the number of chickens died when fed GM corn compared to those fed natural corn. [13]

Soon after GM soy was introduced to the UK, soy allergies skyrocketed by 50 percent. [14] Without follow-up tests, we can't be sure if genetic engineering was the cause, but there are plenty of ways in which genetic manipulation can boost allergies.

  • A gene from a Brazil nut inserted into soybeans made the soy allergenic to those who normally react to Brazil nuts. [15]
  • GM soy currently consumed in the US contains a gene from bacteria. The inserted gene creates a protein that was never before part of the human food supply, and might be allergenic.
  • Sections of that protein are identical to those found in shrimp and dust mite allergens. [16] According to criteria recommended by the World Health Organization (WHO), this fact should have disqualified GM soy from approval.
  • The sequence of the gene that was inserted into soy has inexplicably rearranged over time. [17] The protein it creates is likely to be different than the one intended, and was never subject to any safety studies. It may be allergenic or toxic.
  • The process of inserting the foreign gene damaged a section of the soy's own DNA, scrambling its genetic code. [18] This mutation might interfere with DNA expression or create a new, potentially dangerous protein.
  • The most common allergen in soy is called trypsin inhibitor. GM soy contains significantly more of this compared with natural soy. [19]

The only human feeding study ever conducted showed that the gene inserted into soybeans spontaneously transferred out of food and into the DNA of gut bacteria. [20] This has several serious implications. First, it means that the bacteria inside our intestines, newly equipped with this foreign gene, may create the novel protein inside of us. If it is allergenic or toxic, it may affect us for the long term, even if we give up eating GM soy.

The same study verified that the promoter, which scientists attach to the inserted gene to permanently switch it on, also transferred to gut bacteria. Research on this promoter suggests that it might unintentionally switch on other genes in the DNA – permanently. [21] This could create an overproduction of allergens, toxins, carcinogens, or antinutrients. Scientists also theorize that the promoter might switch on dormant viruses embedded in the DNA or generate mutations. [22]

Unfortunately, gene transfer from GM food might not be limited to our gut bacteria. Preliminary results show that the promoter also transferred into rat organs, after they were fed only a single GM meal. [23]

This is only a partial list of what may go wrong with a single GM food crop. The list for others may be longer. Take for example, the corn inserted with a gene that creates its own pesticide. We eat that pesticide, and plenty of evidence suggests that it is not as benign as the biotech proponents would have us believe.

Preliminary evidence, for example, shows that thirty-nine Philippinos living next to a pesticide-producing cornfield developed skin, intestinal, and respiratory reactions while the corn was pollinating. Tests of their blood also showed an immune response to the pesticide. [24] Consider what might happen if the gene that produces the pesticide were to transfer from the corn we eat into our gut bacteria. It could theoretically transform our intestinal flora into living pesticide factories.

GM corn and most GM crops are also inserted with antibiotic resistant genes. The ICMR, along with the American Medical Association, the WHO, and organizations worldwide, have expressed concern about the possibility that these might transfer to pathogenic bacteria inside our gut. They are afraid that it might create new, antibiotic resistant super-diseases. The defense that the biotech industry used to counter these fears was that the DNA was fully destroyed during digestion and therefore no such transfer of genes was possible. The human feeding study described above, published in February 2004, overturned this baseless assumption.

No one monitors human health impacts of GM foods. If the foods were creating health problems in the US population, it might take years or decades before we identified the cause. One epidemic in the 1980's provides a chilling example. A new disease was caused by a brand of the food supplement L-tryptophan, which had been created through genetic modification and contained tiny traces of contaminants. The disease killed about 100 Americans and caused sickness or disability in about 5-10,000 others. [25] The only reason that doctors were able to identify that an epidemic was occurring, was because the disease had three simultaneous characteristics: it was rare, acute, and fast acting. Even then it was nearly missed entirely.

Studies show that the more people learn about GM foods, the less they trust them. [26] In Europe, Japan, and other regions, the press has been far more open about the potential dangers of genetic manipulation. Consequently, consumers there demand that their food supply be GM-free and manufacturers comply. But in the US, most people believe they have never eaten a GM food in their lives [27] (even though they consume them daily).

Lacking awareness, complacent consumers have been the key asset for the biotech industry in the US. As a result, millions of Americans are exposed to the potential dangers, and children are most at risk. Perhaps the revelations in the reports released on opposite sides of the planet will awaken consumers as well as regulators, and GM foods on the market will be withdrawn.

© Copyright 2004 by Jeffrey M. Smith. Permission is granted to publishers and webmasters to reproduce this article. Please contact [email protected] to let us know who you are and what your circulation is, so we can keep track.

Jeffrey M. Smith is the author of Seeds of Deception: Exposing Industry and Government Lies about the Safety of the Genetically Engineered Foods You're Eating, and the Director of the Institute for Responsible Technology.

Important Note: For an excellent 10-page summary of Jeffreys's most excellent book on the risks and dangers of GMOS, click here. To become more informed of the dangers of GM foods, to access an excellent Action Tool Kit, and to learn how to avoid buying and eating GM foods, see Mr. Smith's excellent website of The Institute for Responsible Technology. You can also sign up for their quality, free newsletter there.

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[1] Pusztai, A. et al. (2003) Genetically Modified Foods: Potential Human Health Effects. In: Food Safety: Contaminants and Toxins (ed. JPF D'Mello) pp. 347-372. CAB International, Wallingford Oxon, UK
[3] SAFETY OF GENETICALLY ENGINEERED FOODS: APPROACHES TO ASSESSING UNINTENDED HEALTH EFFECTS, Committee on Identifying and Assessing Unintended Effects of Genetically Engineered Foods on Human Health, Institute of Medicine and National Research Council of the National Academies, THE NATIONAL ACADEMIES PRESS, Washington, D.C., 2004
[4] Ashok B. Sharma, "ICMR Wants Overhaul Of GM Foods Regulation," Financial Express, New Delhi, India July 25, 2004
[5] Jeffrey M. Smith, Seeds of Deception, Yes! Books, Iowa, US, 2003
[6] Ewen, SWB & Pusztai, A. (1999) Effects of diets containing genetically modified potatoes expressing Galanthus nivalis lectin on rat small intestine. Lancet 354, 1727-1728.
[7] Personal communication with Arpad Pusztai.
[8] French experts very disturbed by health effects of Monsanto GM corn (24/4/2004),, Translation of Le Monde article "L'expertise confidentielle sur un inquiétant maïs transgénique," Confidential report on a worrying GM corn by Herve Kempf, 22.04.04,. Also see Spilling the Beans, June 2005,
[9] Malatesta M, Caporaloni C, Gavaudan S, et al "Ultrastructural Morphometrical and Immunocytochemical Analyses of Hepatocyte Nuclei from Mice Fed on Genetically Modified Soybean". Cell Structure and Function Vol. 27 (2002), No. 4, pp. 173-18.
[10] Manuela Malatesta, et al, Ultrastructural analysis of pancreatic acinar cells from mice fed on genetically modified soybean, Journal of Anatomy, Volume 201 Issue 5 p. 409, November 2002
[11] Advisory Committee on Releases to the Environment, Advice on a notification for marketing of herbicide tolerant GM oilseed rape,
[13] Report for the Chardon LL Hearing, Non-Suitability of Genetically Engineered Feed for Animals, Dr. Eva Novotny, Scientists for Global Responsibility, May 2002,
[14] Mark Townsend, "Why soya is a hidden destroyer," Daily Express, March 12, 1999
[15] J Ordlee, et al, "Identification of a Brazil-Nut Allergen in Transgenic Soybeans," The New England Journal of Medicine, March 14, 1996
[16] G. A. Kleter and A. A. C. M. Peijnenburg, "Screening of transgenic proteins expressed in transgenic food crops for the presence of short amino acid sequences indentical to potential, IgE-binding linear epitopes of allergens," BMC Structural Biology, vol. 2, 2002, p. 8-19
[17] Mae-Wan Ho, Transgenic Lines Proven Unstable, about Collonier C, et al, Characterization of commercial GMO inserts: a source of useful material to study genome fluidity. Poster courtesy of Pr. Gilles-Eric Seralini, Président du Conseil Scientifique du CRII-GEN,
[18] P. Windels, I. Taverniers, A. Depicker, E. Van Bockstaele, and M. DeLoose, "Characterisation of the Roundup Ready soybean insert," European Food Research and Technology, vol. 213, 2001, pp. 107-112
[19] Stephen R. Padgette and others, "The Composition of Glyphosate-Tolerant Soybean Seeds Is Equivalent to That of Conventional Soybeans," The Journal of Nutrition, vol. 126, no. 4, April 1996 (Data was taken from the journal archives, as they had been omitted from the published study. It was reported by Barbara Keeler and Marc Lappé, "Some Food for FDA Regulation," Los Angeles Times, January 7, 2001)
[20] Netherwood, et al, Assessing the survival of transgenic plant DNA in the human gastrointestinal tract, Nature Biotechnology, Vol 22 Number 2 February 2004.
[21] Michael Hansen, "Possible Human Health Hazards of Genetically Engineered Bt Crops: Comments on the human health and product characterization sections of EPA's Bt Plant-Pesticides Biopesticides Registration Action Document," Presented to the EPA Science Advisory Panel Arlington, VA, October 20, 2000
[22] Mae-Wan Ho, Angela Ryan and Joe Cummins, "Cauliflower Mosaic Viral Promoter – A Recipe for Disaster?" Institute of Science in Society,
[23] Jeffrey M. Smith, The cauliflower mosaic virus (CaMV) promoter was found intact in rat tissues after a single meal, and was also confirmed to be active in human cells, Press Release, February 2004,
[24] Jeffrey M. Smith, Bt-maize (corn) during pollination, may trigger disease in people living near the cornfield, Press Release February 2004, and Allen V. Estabillo, Farmer's group urges ban on planting Bt corn; says it could be cause of illnesses, Mindanews / 19 October 2004,
[25] Jeffrey M. Smith, "Deadly Epidemic," Chapter 4 in Seeds of Deception, Yes! Books, Iowa, US, 2003
[26] GM Nation? The findings of the public debate,
[27] Public Sentiment About Genetically Modified Food, September 2003 Update, Pew Initiative on Food and Biotechnology,

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