Your diet is an incredibly powerful thing. As you’ve adapted yours, you’ve most likely seen positive changes in how you look and feel. On the flip side, you also know what your body feels like when it's running on chemical-laden, high-fat foods. And while you generally know what to avoid, some of the worst offenders aren’t so obvious. That's why we've enlisted the help of New York City-based dietitian Tanya Zuckerbrot M.S., R.D., who's helped us compile a short list of foods that should never make it past your lips.