According to one article - Taco Bell 'Taco Filling Mix' contains Isolated Oat Product and Oats. There is some debate whether oats should be classified as a gluten containing food, however, most oat products contain a small amount of wheat 'contamination'.From Taco Bell's website:SEASONED GROUND BEEFBeef, Water, Seasoning [Isolated Oat Product, Salt, Chili Pepper, Onion Powder, Tomato Powder, Oats (Wheat), Soy Lecithin, Sugar, Spices, Maltodextrin, Soybean Oil (Anti-dusting Agent), Garlic Powder, Autolyzed Yeast Extract, Citric Acid, Caramel Color, Cocoa Powder (Processed With Alkali), Silicon Dioxide, Natural Flavors, Yeast, Modified Corn Starch, Natural Smoke Flavor], Salt, Sodium Phosphates. CONTAINS SOYBEANS, WHEATIn addition, Taco Bell's Corn Taco Shells contain oat fiber.