Cold-pressed juice can last in the fridge for 3 to 5 days after juicing. However, the juice will lose about 40 percent of its nutritional value after one day. Juices made with fast juicers, such as centrifugal machines, will lose nutrients much quicker, about 30 to 50 percent per hour. While it may be convenient to make your juice ahead of time, it is best to drink it immediately.