Cold Press juicing slowly extracts the juice from fruits and vegetables using powerful hydraulic press. The centrifugal juicer extraction method involves a high speed cutting blade and strainer that heats the produce and causes oxidation, destroying vital nutrients. The juice needs to be consumed as soon as you make it with a centrifugal juicer because of the oxidation that occurs. Because air is not forced into the juice during extraction, cold press juice will keep for up few days without oxidizing or losing nutritional integrity with proper refrigeration. Some juices may last longer.