Since soy is one of the top 8 allergens, US law requires it to be clearly listed in the ingredients & there's no way to legally get around that by calling it some other name --- it has to declare soy. Included in the allergen law are wheat, milk, eggs, fish, shellfish, tree nuts, peanuts.
See:
http://www.fda.gov/food/guidan...
"FALCPA applies to both domestically manufactured and imported packaged foods that are subject to FDA regulation."
