As it turns out, the Lowest carb option at Taco Bell is the quesadilla. The dish consists of grilled chicken, cheese, and aillas wrapped in a tortilla. It has just 2.5 grams of carbs, which is practically zero. The next Lowest carb option is the chalupa, which has 3 grams of carbs. It consists of grilled pork, cheese, and a sauce wrapped in a tortilla.
The next Lowest carb option is the nachos, which have 5 grams of carbs. They are made with cheese, sour cream, and ground beef, and are served with a side of guacamole. The last Lowest carb option is the burrito, which has 7 grams of carbs. It is made with rice, beans, cheese, and a layer of meat or vegetables.