Oh really?
I didn't know tapioca starch is commonly found in chicken breast meat.
CHICKEN BREAST PATTY Chicken breast with rib meat, water, seasoning (corn syrup solids, vinegar powder [maltodextrin, modified corn starch & tapioca starch, dried vinegar], brown sugar, salt, dextrose, garlic powder, onion powder, chicken type flavor [hydrolyzed corn gluten, autolyzed yeast extract, partially hydrogenated soybean oil and cottonseed oil, thiamine hydrochloride, disodium inosinate & disodium guanylate]), sodium phosphate.
http://subway.com/subwayroot/MenuNut...gredients.aspx