The Steak Taco Bell Power Bowl is full of nutrients that your body needs and loves. You'll get protein from the beef, fiber from the beans and rice, plus vitamins C, K, A, and E in the tomatoes, jalapenos, and avocados. It’s definitely an energy booster! There are also some fats and calories in the sour cream, which can be easily substituted with Greek yogurt as a healthier option. For a leaner Taco Bell bowls, swap the beef for chicken instead.