Pistachios are a great source of antioxidants and dietary fibre. Their calorific value is high but they are rich in monounsaturated fatty acids and are trans-fat free. They are low in sodium and carbohydrates. Considerable amounts of vitamins A, B and E are present along with minerals such as copper, potassium, calcium, iron, magnesium, zinc, manganese, and selenium. These make nutritious snacks that do not take a toll on your weight. 