In an alarming new study published in the journal Food and Chemical Toxicology, researchers from The Committee for Research & Independent Information on Genetic Engineering (CRIIGEN) reported on the results of a 2 year feeding study in rats given either NK603 Roundup-tolerant genetically modified maize, cultivated with or without Roundup, and Roundup alone, at levels permitted in drinking water and GM crops in the United States.
The authors of the study pointed out that currently, no regulatory authority requires mandatory chronic animal feeding studies to be performed for edible GMOs and formulated pesticides, and the only 90 day feeding trials were conducted by the biotech industry.
This study, therefore, was performed in light of this need, and the results were an unprecedented confirmation of the cancer-causing effects of GM food and agrichemicals, reported as follows:
In females, all treated groups died 2–3 times more than controls, and more rapidly. This difference was visible in 3 male groups fed GMOs. All results were hormone and sex dependent, and the pathological profiles were comparable. Females developed large mammary tumors almost always more often than and before controls, the pituitary was the second most disabled organ; the sex hormonal balance was modified by GMO and Roundup treatments. In treated males, liver congestions and necrosis were 2.5–5.5 times higher. This pathology was confirmed by optic and transmission electron microscopy. Marked and severe kidney nephropathies were also generally 1.3–2.3 greater. Males presented 4 times more large palpable tumors than controls which occurred up to 600 days earlier. Biochemistry data confirmed very significant kidney chronic deficiencies; for all treatments and both sexes, 76% of the altered parameters were kidney related. These results can be explained by the non linear endocrine-disrupting effects of Roundup, but also by the overexpression of the transgene in the GMO and its metabolic consequences. [emphasis added]
Below is an image of tumors induced through the experiment. More can be found at the journal website.
The results of this new study are doubly concerning. Not only has the consumption of a genetically modified food crop (NK603 maize, which is approved in the US for human consumption) now been shown to cause tumor growth and accelerated mortality, but so has the primary herbicide these plants have been engineered to withstand exposure to: Roundup. GMO plants actually incorporate glyphosate directly into themselves, with the herbicide residues and their metabolites persisting there, making dual exposure to transgenes and herbicide inevitable, and the synergistic amplification of their toxicities likely. Keep in mind, the study used levels of glyphosate "well below officially set safety limits," which nonetheless induced "severe hormone-dependnet mammary, hepatic and kidney disturbances."