Pistachio is a member of cashew family. These are elongated seed coated with a shell. These elongated seeds are the edible portion. Its scientific name is Pistacia vera. Pistachio contains nutrients like potassium, protein, phosphorus, copper, manganese etc. It also contains vitamin B6 which helps to regulate the blood sugar and formation of hemoglobin. Pistachio the good source of Antioxidants. Pistachio may also help to lose weight.