GMOs sun sake cikin tashin hankali bayan buga binciken da Farfesa Gilles-Eric Séralini ya yi a ranar 19 ga Satumba, 2012, yana nuna tasirin cin masarar transgenic a cikin berayen. Kyakkyawan dalili don yin la'akari da gaskiyar lamarin da kuma yiwuwar tasirin kwayoyin halitta da aka gyara akan lafiyarmu.

Kwayoyin da aka gyaggyarawa, ko GMOs, sune kwayoyin halittar da DNA ta canza ta hanyar sa hannun mutum godiya ga injiniyan kwayoyin halitta (dabarun nazarin halittu ta hanyar amfani da kwayoyin halitta don amfani, sake haifuwa ko gyara kwayar halittar halittu). Wannan dabarar ta sa ya yiwu a canja wurin kwayoyin halitta daga kwayoyin halitta (dabba, shuka, da sauransu) zuwa wata kwayar halitta ta wani nau'in. Sai mu yi maganar transgenic.