Technically a fruit, these edible seeds of the Pistacia vera tree contain healthy fats and are a good source of protein, fiber and antioxidants Technically a fruit, these edible seeds of the Pistacia vera tree contain healthy fats and are a good source of protein, fiber and antioxidants Despite being an energy-dense food, nuts are one of the most weight loss friendly foods on the planet Pistachios are rich in fibre and protein, both of which increase satiety by helping you feel full and eat less Despite having a higher carb content than most nuts, pistachios have a low glycaemic index, meaning they don't cause a large spike in your blood sugar