purple-flesh sweet potatoes varieties are outstanding sources of anthocyanins, especially peonidins and cyanidins. Both types of sweet potatoes are rich in unique phytonutrients, including polysaccharide-related molecules called batatins and batatosides. Sweet potatoes also include storage proteins called sporamins that have unique antioxidant properties. Sweet potatoes are an excellent source of vitamin A. They are also a very good source of vitamin C and manganese. In addition, sweet potatoes are a good source of copper, dietary fiber, niacin, vitamin B5, and potassium.