An English doctor, named Arpad Pusztai, conducted a study on rats fed genetically modified food. His study found that rats that ate genetically modified potatoes had precancerous cells, smaller brains, smaller livers, smaller testes and damaged immune systems. After discovering this, he changed the rats' eating habits by alternating between feeding them organic potatoes and genetically modified potatoes for two weeks at a time. He concluded that every time the rats ate the organic potatoes, their symptoms disappeared, but when the rats ate the GMO potatoes again, the symptoms reappeared. The Pusztai study is not the only one to show that GMOs are harmful. Other studies have also shown that GMOs are linked to reproductive problems, immune system problems, accelerated aging, gastrointestinal disorders, and dysfunctional regulation. This proves that GMOs have a serious effect on our health