Try using an already-opened shell half to pry open a new pistachio. The shells are sturdy enough that you can use them to open one other. [2] X Research source
Use a nutcracker, if you have one. The nutcracker is a tool specifically designed to open up thick nutshells. Place the pistachio between the two arms of the nutcracker, then squeeze the two arms shut to crack the nut.
Studies have shown that eating pistachios in the shell slows down the eating process and lowers overall consumption. Pistachio nuts contain three to four calories each—fewer than almost any another nut—but it can be easy to eat a lot of them when they come pre-shelled. Consider keeping pistachios a “slow” snack by de-shelling them yourself. [3] X Research source
You can also suck on the shells after you have separated them from the nut. This way, you can simply spit out the shell out into the garbage once you’ve finished sucking it.
The pistachio nut is relatively soft and oblong. The color should be some combination of green, brown, and purple. Do not worry if the nut skin appears blotchy and mottled – this is normal!.
One pistachio contains 3-4 calories, on average. Some dietitians suggest a daily portion of 30 grams, or about 49 pistachios – which translates to roughly160 calories. In comparison, an equivalent portion of walnuts contains 190 calories, and the same portion of macadamia nuts contains 200 calories.
