Pistachios offer more than 30 different vitamins, minerals and phytonutrients including lutein and zeaxanthin, two antioxidants associated with a reduced risk of age-related macular degeneration. Worried about the fat and calories? Pistachios are one of the nuts lowest in calories and fat. (They have only three calories per nut―about half the count of most snack nuts.) Small and flavorful, pistachios make a satisfying snack as well as a healthful ingredient in many meals.