Many pre-packaged processed foods contain “empty calories.” That means they are high in calories, but low in nutrition. On the other hand, whole foods, like fresh fruits, veggies, and whole grains, are not processed. They’re in their natural form. They are also rich in nutrients. And whole foods like fruits and veggies are usually a good source of fiber, so you’ll feel full for longer. Eating more whole foods and fewer processed foods can help you get more of the nutrients your body needs, while taking in fewer calories.