The pistachio, often called “the green nut,” is botanically the edible seed of a fruit (a drupe) from the Pistacia vera tree, though it is universally considered a culinary nut. Originating in Central Asia and the Middle East, it has been cultivated for thousands of years, with major world producers today including the United States, Iran, and Turkey. Pistachios are easily recognized by their signature green and purple kernel encased in a hard, naturally split, beige shell. They offer a rich, slightly sweet, and distinct flavor, and are highly valued in both sweet and savory cuisines—especially in confections like baklava and ice cream. Nutritionally, pistachios are a powerhouse, being relatively low in calories compared to other nuts and rich in protein, fiber, healthy fats, and high levels of antioxidants like lutein and zeaxanthin, which are beneficial for heart and eye health.