Newer research suggests that overly processed foods are especially easy to overeat because they can be eaten more quickly and they don’t produce the same level of contentment as more wholesome foods. In one particular study, folks were offered either a highly processed diet or a minimally processed diet for two weeks at a time. During the two weeks of the heavily processed diet, they gained two pounds, but on the whole foods diet, they lost that much. What’s interesting is that these were the same people who participated in each arm of the study. And all the meals were closely matched for macros and calories.