Also known as Kumara. There are different varieties of kumara. The most common is redâ€“skinned with a creamy white flesh. Golden kumara with a golden skin and flesh is also very popular. Kumara (sweet potato) is a very good source of fiber and potassium, and a good source of vitamins A and C. The kumara skins have a special sort of fiber which has a protective role against cancer so leave the skins on whenever you can. They also have some B group vitamins. Juice is a liquid naturally contained in fruit or vegetable tissue. Juice is prepared by mechanically squeezing or macerating fresh fruits or vegetables without the application of heat or solvents. For example, orange juice is the liquid extract of the fruit of the orange tree. Juice may be prepared in the home from fresh fruits and vegetables using variety of hand or electric juicers. Many commercial juices are filtered to remove fiber or pulp, but high pulp fresh orange juice is a popular beverage. Juice may be marketed in concentrate form, sometimes frozen, requiring the user to add water to reconstitute the liquid back to its "original state". However, concentrates generally have a noticeably different taste than their "fresh-squeezed" counterparts. Other juices are reconstituted before packaging for retail sale. Common methods for preservation and processing of fruit juices include canning, pasteurization, freezing, evaporation and spray drying.