People often have a preconceived attitude towards the problem of genetically modified food before they have a thorough understanding of relevant information. Even some scientists and scholars have their own characteristics when engaged in related research, which seriously affects the scientific nature of experimental results and theories.

Many scientists have studied the animal effects of genetically modified foods, but in the end they just became rumors, with no definite results.

The "Putztai" incident is considered as a turning point in public opinion that triggered the debate on the safety of genetically modified crops. 1In the autumn of 998, Arpad Pusztai, a scientist from the Scottish Lovett Institute, made a speech on TV, saying that he fed the mice with potatoes with snowdrop lectin gene in the experiment, and then the weight of the mice and organs decreased seriously, and the immune system was destroyed. This statement caused an international sensation. Driven by green, equal and environmental protection NGOs, Europe has set off an anti-GM food craze. Pustai's experiment was questioned. It is said that he rashly disseminated his conclusions to the public through the media before completing the experiment and publishing the data. The genetically modified potato he studied was made by himself. At that time, there was no possibility of listing, and he was not in a hurry to publicize the experiment.

The Royal Society attached great importance to the "Pustai Incident" and organized experts to conduct peer review on the experiment. 1 May, 1999, the evaluation report pointed out that there were six major mistakes and defects in Pustai's experiment: (1) The difference in chemical composition between transgenic and non-transgenic potatoes could not be determined; Do not add protein to mice that eat genetically modified potatoes to prevent hunger; The number of experimental animals is small, and feeding several different foods is not the standard food for rats, which lacks statistical significance; The experimental design is poor, and no double-blind determination is made; Improper statistical methods; The experimental results are inconsistent. Later, the Lovett Institute announced that Pustai had retired early and was no longer responsible for his remarks.