He believed in the promise of GM foods, was commissioned to study them, and conducted the first ever independent one on them anywhere. Like other researchers since, he was shocked by his findings. Rats fed GM potatoes had smaller livers, hearts, testicles and brains, damaged immune systems, and showed structural changes in their white blood cells making them more vulnerable to infection and disease compared to other rats fed non-GMO potatoes. It got worse. Thymus and spleen damage showed up; enlarged tissues, including the pancreas and intestines; and there were cases of liver atrophy as well as significant proliferation of stomach and intestines cells that could be a sign of greater future risk of cancer. Equally alarming, results showed up after 10 days of testing, and they persisted after 110 days that's the human equivalent of 10 years.
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http://rense.com/general80/haz.htm
And the fact that there have been 'exucutive orders' since George H.W.Bush, keeping the FDA from examining GMO crops, I might be more in line with the technology.
IMHO, ya don't need executive orders, banning the testing of a food product that is being distributed to the public, unless there is something to hide.