This is the largest cultivated GM crop in the world and most of it goes to livestock feed. There is only one kind of GM Soy in the market – one which can tolerate more chemicals used on it (herbicide-resistant). There are many studies that show adverse health effects from GM Soy.
In a single year (1999), soy allergies in the United Kingdom jumped from 10% to 15%. A 1999 study by Dr. Marc Lappe published in the Journal of Medicinal Food found that concentrations of beneficial phytoestrogen compounds thought to protect against heart disease and cancer were lower in GE soybeans than in traditional strains.