Their website says the ingredients are beef, salt, and pepper.
It appears that the beef patties indeed do not contain additives: http://designtaxi.com/news/353751/McDonald-s-Reveals-How-Its-Beef-Patties-Are-Made/
Their website says the ingredients are beef, salt, and pepper.
It appears that the beef patties indeed do not contain additives: http://designtaxi.com/news/353751/McDonald-s-Reveals-How-Its-Beef-Patties-Are-Made/