Juicing is one of the quickest and most delicious ways to put your health back on track. It concentrates the nutrients found in fruits and vegetables, extracting them from fibre - a job usually undertaken by your digestive system. You would have to eat carrier bags full of fruit and vegetables to get the same level of concentrated vitamins and nutrients in one glass. For example, you would need to consume 1lb (500g) of raw celery to gain the same nutrients as one cup of its juice.