SWEET POTATO HISTORY
Both sweet potatoes and white potatoes are tuberous root vegetables, but they differ in appearance and taste.
They come from separate plant families*, offer different nutrients, and affect your blood sugar differently.
The origin and domestication of sweet potato occurred in either Central or possibly, South America.
Archaeological evidence shows that domesticated sweet potatoes were present in Central America at least 5,000 years ago, with the origin possibly between the Yucatán Peninsula of Mexico and the mouth of the Orinoco River in Venezuela.
The cultivated plant spread to South America and the Caribbean by 2500 B.C.E. [source]. The sweet potato spread to Polynesia with explorers, dating to 1400 C.E. in the Cook Islands.
They were brought to Europe by Christopher Columbus, and then traveled to Africa. Numerous species are now grown worldwide.
Most sweet potatoes sold in the U.S. have brown skin and orange flesh, but other varieties include purple, yellow, and red varieties—and are well worth seeking out.
Our favorite, the Murasaki from Japan (murasaki means violet or purple), has purple skin and sweet yellow flesh. It is well worth seeking out (we buy ours at Trader Joe’s).
SWEET POTATO VS. WHITE POTATO NUTRITION
Sweet and white potatoes are comparable in their calorie, protein, and carbohydrate content: around 90 calories 2 grams of protein and 21 grams of carbs.
Sweet potatoes are high in vitamin A. They are rich in antioxidants, which help fight cell damage caused by free radicals.
White potatoes are higher in potassium, whereas sweet potatoes are higher in vitamin A. They contain compounds called glycoalkaloids, which have been shown in early testing to have anti-carcinogenic properties.
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*Both types of potato are members of the Solanales order, an order of flowering plants. But they branch off at the family level.
Sweet potatoes, Ipomoea batatas, are from the Convolvulaceae family, commonly known as the morning glory family, a family of mostly herbaceous vines. Their species is Ipomoea, genus Batatas.
White potatoes, Solanum tuberosum, are members of the Solanaceae family, popularly known as the nightshades. Their genus is Solanum, species Tuberosum.
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