Genetic engineering is inherently unpredictable and therefore potentially dangerous for humans, animals, the environment, and for the future of organic biodiversity.
Genetic engineering can produce unforeseen and unknown allergens and toxins in foods.
37 people died, and 5000 more were permantly afflicted from toxic effects of the genetically engineered supplement, L-Tryptophan in 1989. As for the environmental effects, recent studies have found that US farmers growing GE crops are using just as many toxic pesticides and herbicides as conventional farmers. Genetic pollution of organic and non-GE crops is starting to happen by way of wind, rain, bees and birds as genetically altered pollen gets carried miles beyond into other fields and overpowering wild species in the same way that Kudzu vine and Dutch Elm disease have created great problems in North America. Even the so-called organic foods may contain traces of genetically modified organisms due to wide spread pollination.