Pistachios,contribute more than 10 different antioxidants which help to fight free radicals. Almost 90% of the fat found in pistachios is the healthy mono- and polyunsaturated fats. Meanwhile, Pistachios have more potassium than any other nut. Did you know a serving of pistachios has more potassium than half of a large banana? That's pretty powerful. The green color in pistachios comes from a compound called lutein which helps to support eye health.