It’s no secret that calorie-rich foods are a major contributor to weight gain and obesity. But a junk food diet doesn’t just pack on the pounds, it may reduce a person's desire to eat a more diverse diet. Brains are wired to not overeat too much of one thing and to seek out different foods.
However, a new study has found that rats on a junk food diet appear to lose the desire for other kinds of food. In a recent study published in Frontiers in Psychology, researchers from Australia showed that rats eating a diet of high-calorie foods like cookies, pie, dumplings, and cake for two weeks not only gained weight but also lost their desire to seek out different foods. A diet of diverse foods is typically a healthier diet because it means that you’re not eating too much of any one item.