Pistachios have a naturally tan and a pale green nut that’s high in calcium. The green colour is the result of chlorophyll that develops as the seeds grow. Like other types of nuts, pistachios provide valuable amounts of minerals including calcium, iron, magnesium and zinc.  They are the richest source of potassium of all nuts and are also an excellent source of protein and fibre.  Both magnesium and potassium are protective against heart disease.

When buying unshelled pistachios, avoid those with fully closed shells, which indicates that the nutmeat is immature. A popular snack eaten raw, pistachios also give crunch and a nutty flavour to desserts like baklava.