There are many popular “diet foods” available now, and it’s easy to assume that generally, these are healthy options. They often promise to be “low calorie,” or “low fat,” or “low sugar,” to boost your metabolism, or even suppress your appetite. Unfortunately, many of these foods cause more harm than they do good. On this page, we’ll break down some of the most popular “diet foods” and ingredients out there today, and the potential threats to your health they pose.