Lab rat diets contaminated: chemical and GMO safety tests invalid


A new French study (the study was published in PLOS ONE on July 2nd this year, and can be found here: Laboratory Rodent Diets Contain Toxic Levels of Environmental Contaminants: Implications for Regulatory Tests) has shown that feeds commonly used as standard diets in safety tests performed on rats, are contaminated with hazardous substances and often also with genetically modified organisms (GMOs).

Why is this study important?
Because this may help to explain the common problem hindering safety tests that the rats used often develop health problems even without being exposed to the tested substances. Chemicals and GMOs subjected to such safety tests are often authorised despite this problem. But most importantly because the new findings raise doubts about the validity of these safety tests, and consequently about the safety of the products tested, including a range of chemicals and GMOs.

What does this study showcases?
That the safety of many chemicals and GMOs tested this way and subsequently authorised, is now shrouded in great uncertainty.

What does this mean?
It means that the tests used to check the safety of specific chemicals and GMOs produce uncertain results.
Bottom line: It means that these tests cannot guarantee the safety of the chemicals and GMOs they test and thus that authorisations are granted to potentially harmful chemicals and GMOs.

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Lab rat diets contaminated: chemical and GMO safety tests invalid