How do chain restaurants ensure the products listed are actually gluten free?
No chain restaurant anywhere guarantees that any item will be gluten free. And, there are good reasons for that. Most chains use multiple suppliers for ingredients and change recipes periodically, making it impossible to always know the exact contents of any dish. And, virtually every restaurant presents some risk of potential cross-contamination in the preparation of dishes. The lists provided by these chain restaurants make excellent starting points for thinking about your food and choosing dishes that are likely to be safe, but it’s up to you to talk with the manager/staff at your local restaurant to determine if the food they prepare is suitable for your dietary needs.