Purple sweet potato is planted in the Eastern provinces of Vietnam such as Ving Long, Dong Thap and Tra Vinh provinces with bulk quantites all year round.

Purple Sweet potatoes contain a variety of nutrients needed by the human body. Each 500 grams of sweet potato can produce about 635 kcal of heat energy, containing 11.5 grams of protein, 14.5 grams of sugar, 1 gram of fat, 100 mg of phosphorus, 90 mg of calcium, 2 grams of iron, 0.5 mg of carotene, and vitamin B1, B2, and vitamin B2. C and niacin, linoleic acid, etc which are good for human's health