Yes! Genetic engineering moves lectin molecules from one species to another. Since lectins are the molecules that interact with our blood types, an OK food can easily become an avoid. Currently, the only way to safely avoid 'GE' foods is to choose organic.
The Complete Blood Type Encyclopedia is the essential desk reference for Dr. D'Adamo's work. This is the first book to draw on the thousands of medical studies proving the connection between blood type and disease.