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There is a reason why juicers range so widely in price. When looking to buy a new juicer, many people make the mistake of distinguishing solely based on price. The problem is that there is a difference in quality that warrants the higher prices for better juicers. You want a juicer that is of quality and produces high quality results for the ingredients you put in.
The worst part is that someone who is just beginning to juice their own fruits and vegetables for the first time would not know if the juice is of inferior quality due to the poor performance of their juicer. The most important thing is the speed at which the blades operate. A good juicer runs at much lower speeds than a cheap machine. Too much speed means a lot more damage to the natural goodness of the juice.
The heat generated by fast blades will essentially cook your fruits and vegetable juice which alters the chemical structure of the nutrients. The purpose of juicing is to consume as much of the nutritional value the ingredients have to offer, and it is best when in its most natural state. A high quality juicer will operate under 100 RPM to minimize the heating of the elements in your juice.
High speed chopping blades in blenders can also cause impact shock which also damages nutrients. There is also oxidation when you juice, but slower blades will significantly reduce the degree of oxidation. You want your nutrients in its most natural state which is best for your body. Lower speeds also reduce the amount of foaming in your juice.
Another consideration is the noise generated by some juicers. Higher end models will create significantly less noise when in use than cheaper blenders. It really is the difference between being unable to hear yourself think and being able to talk on the phone while juicing.
When you pay a little extra for a better model, you are also getting the ingenuity of design. In general, juicers can be tough to clean but a well designed model takes the cleaning process into consideration and could make a big difference when you are deciding whether or not to juice today. Pulp collecting compartments that are easily removable makes cleaning breeze. Some brands are so well designed in this area it can be rinsed and cleaned in five minutes.
The final thing about juicers is their hardiness. Some juicers, such as centrifugals, are not designed for harder ingredients like leafy greens and wheat grass. They are built only for citrus fruits and other soft ingredients. Since everyone should juice vegetables as well as fruits, it best to go with one that can handle just about anything you throw into it.