Researchers have found that in some biotech study cases meant to measure the safety of Round Up crops, the rat feed given to rats in both the control group AND the testing group was contaminated with the same GMOs and pesticides (and heavy metals). In other words, laboratory rodent feeds are highly contaminated with pesticides, toxic metals, PCBs, and GMOs.

The study comes from researchers at the University of Caen in France and is slated to be published in the journal PLOS ONE.