At face value, the sandwich contains just pork, onions, and pickle slices slathered in barbecue sauce and laid out on a bun. But the truth is, there are roughly 70 ingredients. The bun alone contains 34, says TIME’s Melnick. In addition to chemicals like ammonium sulfate and polysorbate 80, the most egregious may be azodicarbonamide — “a flour-bleaching agent most commonly used in the manufactur[ing] of foamed plastics like gym mats the and soles of shoes.” According to McDonald’s own ingredient list, the bun also includes calcium sulfate and ethoxylated mono- and diglycerides, among other chemicals
.So, what’s the meat made of?