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.