A new study in the British Journal of Nutrition finds that fat in pistachios nuts might not be completely absorbed by the body.
The calorie information you see on the side of a food packet is obtained by 'burning' the food in a device called a calorimeter. From this the boffins can tell how much is protein, carbohydrate or fat. All well and good, but the human digestive system isn't a simple piece of lab equipment. There are far too many factors that come into play, including the persons gut health, and what else is being ingested at the time.
