Akbari raw pistachios

Both raw and roasted pistachios are safe if consumed in moderation. Raw nuts may carry harmful bacteria, but they are very healthy. So, they probably won't cause health problems as long as you keep track of your consumption. Roasted pistachios are not harmful in serving amounts.
Most nutritionists recommend their clients consume no more than two ounces (56 grams) of pistachios every day. For shelled pistachios, that adds up to 90 pistachios. Nutritionists also advise people to drink a sufficient amount of water to digest. Otherwise, you may get an upset stomach after eating pistachios.
But the reasons why pistachios are so expensive might surprise you. It's far less about the demand for the bright green nuts and more so with the intense and difficult labor growing and harvesting the nuts requires. Getting pistachio trees to take root and prosper requires a very particular climate and plenty of time.
While the shell of the pistachio is naturally beige, the seed itself (the part we eat) is typically different shades of green with a bit of purple. This green color comes from chlorophyll, the same green pigment found in other fruits and vegetables like celery, green apples, and lettuce.