Pretty cool, huh?Pistachio nuts are deliciously nutritious of course, with one serving providing 3 grams of fiber and 6 grams of fiber, along with a host of phytonutrients and vitamins and minerals such as copper, manganese, thiamin, and vitamin B6.In-shell pistachio nuts have that perfect snacking combination {IMO} of a little bit salty, with just a hint of sweet.