A juicer is a tool for separating juice from fruits, herbs, leafy greens and other types of vegetables from its pulp in a process called juicing. In separating the pulp, juicers concentrate the nutrition naturally present in fruits and vegetables which allows the body to more easily absorb the nutrition than digesting the solid produce. The use of juicers also makes it easier to consume more raw produce. Some juicers of the masticating or twin gear variety perform extra functions too, such as crushing herbs and spices, and extruding pasta.