It is also preferable that the walnuts you buy be organic. Typically organic walnuts can provide you with more nutritional benefits as well as fewer pesticides which can be dangerous to consume. Many people do not realize just what they are ingesting when buying and eating non-organic foods from the grocery store.
Since you never know which chemicals are used on walnuts and whether or not there are still traces of them present, it will be important to buy organic just in case. Unfortunately organic foods including walnuts are not as readily available as non-organic foods, due to the fact that less than one percent of farmers across the country produce organic foods.