The edible root of the sweet potato is a large, starchy, and sweet root vegetable. The sweet potato is actually only distantly related to the potato, and is therefore often marketed as a "yam." However, the sweet potato is very distinct from the actual yam, which is native to Africa and Asia and belongs to the monocot family Dioscoreaceae.
Sweet potatoes are rich in complex carbohydrates, dietary fiber, beta carotene (a vitamin A equivalent nutrient), vitamin C, and vitamin B6. Pink and yellow varieties are high in carotene.