JUICERS:
Excerpts By Joshua Schmidt (Juicy Josh)
The removal of the fibers in extraction of the juices enables juices to be very quickly digested & assimilated, sometimes in a matter of minutes, with a minimum of effort and exertion on the part of the digestive system. There are three types of juicers used in juicing.
Centrifugal (such as the Breville)
Most every day, low cost juicers are the centrifugal variety. These juicers use a flat cutting blade on the bottom of a rapidly spinning basket where food is quickly shredded by the cutter and flung out to the sides of the basket. The high centrifugal force passes the juice through tiny holes in the basket and through a spout. The pulp is spun off into a separate container.
These juicers are great for most fruits and vegetables and if it has a wide tube feeder most ingredients do not require the time consuming pre-cutting other juicers require.
The juice is excellent but the extraction process (higher revs and motor heat) incorporates more oxygen which oxidizes the juice destroying more enzymes and therefore diminishing the health benefits a bit as well as reducing the shelf life. Leafy green vegetables do not break down as well in these juicers. To more efficiently juice greens the masticating juicer does this work extremely well!
Masticating
Mastication means to "chew". These juicers use a slow rotating single auger (or boring tool) to literally crush and chew the produce into juice and pulp. The pulp is squeezed up against a mesh strainer so the juice is extracted while the pulp remains behind and gets ejected. These juicers produce more juice than the centrifugal juicers. Because they run at much lower RPMs creating less oxygenation, the juice is more nutritionally dense and has a longer shelf life.
For every day use, most people are unhappy with its slow speed and small tube feed which requires more time pre-cutting fruits and veggies prior to juicing.
Twin Gear (such as Greenstar 2000)
Twin gear is also a masticating process but instead of a single auger two stainless steel gears with very close separation that turn in towards each other crush the produce between them. The juice is then passed through a screen and the pulp is ejected similar to the masticating juicers. With a high power motor you can literally juice anything. At the same time they have the lowest RPM and therefore the most nutritious juice with the least oxidation. They tend to be more expensive but you're paying for quality.
