The cold subs are your best bet here, as the hot subs go on the stove which has cross contamination with bread according to the staff member I spoke with. When I said I was getting a gluten free sub, they offered to change their gloves and get a dedicated cutting board. They seemed very knowledgeable about cross contamination. The staff member at the head of the line cleaned down the slicing machine and was persistent in making sure everyone down the line changed their gloves before my sub got to me. If you’re very sensitive, I could imagine cross-contamination might still be an issue with the possibility of crumbs getting in the toppings throughout the day. The bread is meh but overall a good sub and they even have a gf snickerdoodle cookie option.