From Frugivore — If you are one of the Americans who gets excited each year when McDonald’s brings back the McRib for the ‘last’ time, you may want to sit down before reading this. Time reports that the frequent ‘for a limited time only’ McMenu item has seventy ingredients total and thirty-four in the bun alone. Among them? The ever yummy “azodicarbonamide, ammonium sulfate and polysorbate 80″! Fun fact about azodicarbonamide: it’s a flour bleaching agent that is commonly used in manufacturing foamed plastic (think sneaker soles and gym mats).