The sweet potato has been called a "superfood", since it is a good source of both fiber and potassium, and high in both vitamins A and C.
Sweet Potato or Yam?
Although Americans often refer to sweet potatoes as yams, true yams are not heavily marketed in the United States. There are many varieties of sweet potatoes, but just two of those are widely available. One has a thin, light yellow skin and pale yellow flesh which becomes dry and crumbly when cooked. The other is often erroneously referred to as a yam. It has a thicker, dark orange skin and a bright orange flesh that becomes moist when cooked. Bright orange potatoes sold in cans and labeled as yams are actually sweet potatoes.