Firstly, all juices should be made fresh immediately before drinking. Canned and frozen juices should not be used. It will be advisable that one should have one's own juicer for extracting fresh juices. Secondly, only fresh ripe fruits and vegetables, preferably organically grown, should be used for extraction of juices. Thirdly, only as much juice as needed for immediate consumption should be extracted.
Raw juices oxidise rapidly and lose their medicinal value in storage, even under refrigeration.
Fourthly, the quality of the juices has a distinct bearing on the results obtained. In case of incomplete extraction of juices, their effective power is proportionately reduced due to the absence of the vitamins and enzymes which are left behind in fibre and the pulp. This is especially important in some specific conditions such as diabetes, hypoglycemia, arthritis and high blood pressure. Fruit and vegetable juices may be divided into six main types. Juices from sweet fruits such as prunes and grapes.