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https://ncsweetpotatoes.com/sweetpotatoes-101/

That sweet, orange-colored root vegetable that you love so dearly is actually a sweetpotato. Yes, all so-called “yams” are in fact sweetpotatoes. Most people think that long, red-skinned sweetpotatoes are yams, but they really are just one of many varieties of sweetpotatoes. So where did all of the confusion come from? Let’s break down the main differences between yams and sweetpotatoes!