A chicken taco salad without dressing at one Mexican restaurant chain contains a whopping 1,180 calories. In addition, it provides 75 grams of fat, 79 grams of carbohydrate, 52 grams of protein, 13 grams of fiber, and 2,160 mg of sodium. A chicken taco salad like the aforementioned provides more than half the calories the average adult needs in a day. The fried taco shell is a major source of calories, contributing approximately 390. Sour cream, cheese and guacamole also provide a significant number of calories.