does mcdonald's foods have soy in them?
There is rumor that Mcdonalds purchased a meat company called All-Beef. This allows them the ability to still use the term âall beef pattiesâ but use 20% meat and 80% soy product in their burgers. [Collected via e-mail, February 2002] Mcdonalds boast that they use 100% beef in their burgers.