Because heat is used during the dehydration process, pineapple loses much of its nutrient content when it is dried. Water-soluble vitamins, such as vitamin C, deteriorate rapidly, as do minerals like potassium and calcium, which tend to drop by at least 50 percent. Dried pineapple holds onto its sugar content, however, and is two to three times higher in calories than raw pineapple. As a snack, it is an effective low-fat way to get some quick energy, but if you are trying to watch your weight or your blood sugar level, eating fresh pineapple or a lower-sugar fruit in moderation is a healthier option.