I think they actually advertise 100% ground beef.
Despite all those myths out there, none of our meat is fake! McDonald’s uses only 100% USDA-inspected beef from real beef cattle to make our burger patties.
~ mcd.com
Granted, they get the cows from S. America and ship them frozen, in bulk, to the US.
However, you will see no claim that their buns are made from 100% real USDA-inspected grains, or are whole grains, or are not gelatinized, congealed high fructose corn syrup with three tablespoons of salt on them… Not that I could prove that they are, but all I know is, if you eat a cheeseburger (you know, the original?) you seem to gain 14 pounds and are ravenous in moments…or maybe it’s just me?
And Subway’s no better! Google it, the reports about unclean machinery and unwashed food is INSANE for them too!
That said, eat what you want to eat. FFS guys, it’s the United States of America! If you want to live on frozen pizza, live on frozen pizza! If you want to be a vegetarian, well, just keep in mind vegetarians are food for carnivores in the case of a global food epidemic, such as Nuclear War when the plants die off. :P