In a Life&Style article, "Small Changes, Big Results," 20 simple daily changes are listed that will help aid in weight loss. A daily dose of pistachios is on the list, recognized for having the most nuts per serving of any snack nut and for having the lowest amount of calories per nut.

No. 19: We're nuts for pistachios

A 1-ounce serving (think 49 kernels) of pistachios has only 158 calories and 5.8 grams of protein — making it a high-energy snack. Just 13 cashews have the same amount of calories!