Pistachios are one of the oldest edible nuts and are commonly used all over the world. They are native to Asia, particularly in Iran and Iraq. Archaeological evidence dates the association of pistachios and man as early as 6,000 BC. They were cultivated in Iran, Iraq, and Syria and were introduced to the Romans only in 100 AD. Today, apart from Iran, Iraq, and Syria, pistachios are being produced in many countries such as the United States, Australia, Turkey, and China, among others. Pistachio nuts belong to the Anacardiaceae family from the genus Pistacia. A pistachio tree takes about 10 to 12 years to produce the first crop. They are drupe, where the fruit has a large seed in the center. This seed is edible. The nuts of pistachio are not seasonal and are available all year long. They can be bought from almost any grocery store. Pistachios are available today in various forms such as shelled, unshelled, sweetened or salted. The shell of the nut protects it from physical damage and various infections. On the other hand, salted and sweetened pistachios may not be a good choice because of their high sodium and sugar content. The ideal way is to buy unshelled nuts, as they are in their natural form. They must be stored in airtight containers in cool and dry places so that they can last for many months without going bad. Pistachio Nutrition Facts Pistachios contain nutrients such as carbohydrates, protein and amino acids, fats, and dietary fiber. They are rich in minerals such as phosphorus, potassium, calcium, iron, magnesium, manganese, zinc, copper, sodium, and selenium. They also provide you with essential vitamins like vitamin A, vitamin K, vitamin C, vitamin E, vitamin B6, thiamine, riboflavin, niacin, folate, pantothenic acid, choline, and betaine. According to Thomas and Gebhardt (2006), pistachios contain a lower calorie content of only 160 calories per one ounce in comparison to other nuts and dried fruits such as cashew nuts, walnuts, almonds, pecans, hazelnuts, Brazil nuts, and chestnuts.