In 1992, the Food and Drug Administration claimed that they had no information showing that GMO foods were substantially different from conventionally grown foods and, therefore, were safe to eat. However, internal memos made public by a lawsuit reveal that their position was staged by political appointees under orders from the White House to promote GMOs. FDA scientists, on the other hand, warned that GMOs can create unpredictable, hard-to-detect side effects, including allergies, toxins, new diseases, nutritional problems, as well as environmental issues such as superweeds, superbugs, and adverse effects on essential insects such as butterflies and bees. The concerned scientific community urged long-term safety studies but were ignored. The FDA does not require any long-term safety evaluations for GMOs.”   
Institute for Responsible Technology 

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US-based Monsanto was the largest producer and supplier of genetically modified food in the world at the time