Straight from the jack in the box website
Beef Regular Taco or Beef Monster Taco Filling Ingredients: Beef, Water, Textured Vegetable Protein (Soy Flour, Caramel Color), Soy Grits, Seasoning [Chili Powder (Chili Peppers, Spices, Salt, Garlic Powder), Wheat Flour, Taco Mix (Chili Pepper, Garlic, Salt, Spices, Monosodium Glutamate, Dextrose, Onion), Imitation Beef Extract (Hydrolyzed Soy Protein, Hydrolyzed Soy, Wheat and Corn Protein, Monosodium Glutamate, Dextrose, Partially Hydrogenated Soybean Oil, Disodium Guanylate, Disodium Inosinate), Silicon Dioxide (added to prevent caking)], Salt, Tomato Paste, Worcestershire Sauce (Distilled Vinegar, Molasses, Corn Syrup, Water, Salt, Caramel Color, Garlic Powder, Sugar, Spices, Tamarind, Natural Flavor, Sulfiting Agent). Tortilla Ingredients: Ground Corn, Water, Lime. Soy, Wheat, Monosodium Glutamate, Sulfites