Foods that are dense with nutrients, such as “protein” or “energy” bars, may also be dense with calories. Some eaters believe such foods are acceptable and they have license to consume whatever and however much they want. But it is not just “junk food” sugars that can cause diabetes. Foods with high carbohydrate count are converted into glucose and that includes fruits and grains. Many calorie-burning, low-body-fat athletes have found out the hard way that their diets of large amounts of spaghetti, fruits, cheese burgers, energy bars, fast food and beer has set them up for diabetes.