Originally Posted by
readywhenyouare
Subway adds azodicarbonamide to their bread to strengthen it. It's a sketchy additive that hasn't been fully tested.
Azodicarbonamide, ADCA, ADA, or azo(bis)formamide, is a chemical compound with the molecular formula C2H4O2N4. It is a yellow to orange-red, odorless, crystalline powder. It is sometimes called a 'yoga mat' chemical because of its widespread use in foamed plastics
That explains the taste!