Genetically Modified Soy Diets Lead to Ovary and Uterus Changes in Rats


If you’re still eating genetically modified (GM) soybeans and you plan on having kids, a Brazilian study may make you think again about what you put in your mouth. Female rats fed GM soy for 15 months showed significant changes in their uterus and reproductive cycle, compared to rats fed organic soy or those raised without soy. Published in The Anatomical Record in 2009, this finding adds to the mounting body of evidence suggesting that GM foods contribute to reproductive disorders (see summary at end).

Unlike women whose menstrual cycle starts automatically at puberty, female rats need to be "inspired." Their (estrous) cycle conveniently kicks in only after being introduced to male rats. Since no males were present in this study, the females fed organic soy or no soy were appropriately untriggered (diestrus).  For some odd reason, however, those fed GM soy appeared to have their ovulation cycle in full gear.

Although the researchers did not perform a check on the estrous cycle directly, their microscopic analysis of ovaries and uterus tissue showed that the hormone-induced changes (i.e. early ovulation and formation of corpus luteum) were well underway. In addition, the lining of the uterus (endometriim) had more cells than normal and the glands were dilated. In simpler terms, according to senior UK pathologist Stanley Ewen, something in the GM soy diet was "wrecking the ovary and endometrium" of the rats.

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Biotech Propaganda Cooks Dangers out of GM Potatoes

Don’t worry your little heads over the gene-spliced foods on your plates. Just trust companies like Monsanto when they tell you their genetically modified organisms (GMOs) are perfectly safe.

That’s the upshot of a new website created on behalf of the biotech industry by GMO advocates Bruce Chassy and David Tribe. While they attempt to discredit the scientific evidence in my book Genetic Roulette: The Documented Health Risks of Genetically Engineered Foods, instead they offer priceless examples of distortion, denial, and spin. Their site is yet another example of why we can’t trust GMOs, Monsanto, or the so-called scientists who support them.

In a series of rebuttals, I expose this charade and show why healthy eating starts with no GMOs.

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Monsanto: The World’s Poster Child for Corporate Manipulation and Deceit – Part 3

Covering up health dangers

The policy Taylor oversaw in 1992 needed to create the impression that unintended effects from GM crops were not an issue. Otherwise their GRAS status would be undermined. But internal memos made public from a lawsuit showed that the overwhelming consensus among the agency scientists was that GM crops can have unpredictable, hard-to-detect side effects. Various departments and experts spelled these out in detail, listing allergies, toxins, nutritional effects, and new diseases as potential problems. They had urged superiors to require long-term safety studies. In spite of the warnings, according to public interest attorney Steven Druker who studied the FDA’s internal files, “References to the unintended negative effects of bioengineering were progressively deleted from drafts of the policy statement (over the protests of agency scientists).”

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Genetically Modified Foods: Toxins and Reproductive Failures

Rhetoric from Washington since the early 1990s proclaims that genetically modified (GM) foods are no different from their natural counterparts that have existed for centuries. But this is a political, not a scientific assertion. Numerous scientists at the FDA consistently described these newly introduced gene-spliced foods as cause for concern. In addition to their potential to produce hard-to-detect allergies and nutritional problems, the scientists said that "The possibility of unexpected, accidental changes in genetically engineered plants" might produce "unexpected high concentrations of plant toxicants."[1] GM crops, they said, might have "Increased levels of known naturally occurring toxins, . . . appearance of new, not previously identified" toxins, and an increased tendency to gather "toxic substances from the environment" such as "pesticides or heavy metals." They recommended testing every GM food "before it enters the marketplace."[2] But the FDA was under orders from the first Bush White House to promote the biotechnology industry, and the political appointee in charge of agency policy was Monsanto’s former attorney—later their vice president. The FDA policy ignored the scientists’ warnings and allowed GM food crops onto the market without any required safety studies.

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