Animal feeding studies
THIRD WORLD NETWORK BIOSAFETY INFORMATION SERVICE
PRESS RELEASE: STUDIES SHOW THAT ANIMALS FED ON A GM DIET FACE ORGAN PROBLEMS
A new report reviewing 19 studies of mammals fed with commercialized GM soybean and maize (which represent more than 80% of all GMOs grown on a large scale) indicates liver and kidney signs of toxicity in mammals fed on a GM diet. The report by Gilles-Eric Séralini et al is published in Environmental Sciences Europe (2011, 23, 10-20).
The authors studied data from biotech companies from 90-day-long feeding tests on rats that include biochemical blood and urine parameters of mammals eating GMOs modified for herbicide tolerance and insecticide production. The tests were conducted as a result of court actions or official requests and the authors reviewed the studies in the scientific literature.
Though the tests may not point to chronic toxicity of GMOs since the 90 day period is too short, the authors nonetheless cautioned that the signs highlighted in the kidneys and livers could spell the onset of chronic diseases: on a total of 9% of disturbed parameters, 43% are concentrated in the kidneys of the male rats. The researchers suggested that more detailed and prolonged studies should be conducted. They underlined that since no minimal length for the tests is yet compulsory for any of the GMOs cultivated on a large scale, it was socially unacceptable in terms of consumer health.
The authors also suggested an alternative to conventional feeding trials, to understand the biological significance of statistical differences. This approach will make it possible to avoid both false negative and false positive results, in order to improve safety assessments of agricultural GMOs before their commercialization for cultivation for food and feed as well as for imports. This is the most comprehensive review on this topic to date.
The full paper is available at: http://www.enveurope.com/content/23/1/10
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