As you can see, their skin is tan, but inside their flesh is an eye-popping violet laced with white. And when they're cooked, they turn from violet to purple...
The Caveman Diet includes sweet potatoes, although some Paleo-type diets don't. For a starchy vegetable, these particular sweet potatoes don't tend to stimulate blood sugar as much as other carbs might. They're very sweet, but it may be that they don't raise insulin as much as some other carbs.
They are extremely high in antioxidants, some say higher than blueberries. This makes sense because in nature, colors -- whether green, yellow, orange, red, blue or purple -- typically mean high antioxidant levels.
There are a number of studies underway testing health benefits of purple sweet potatoes. I'm guessing that purple sweet potato extract will become a big product in the future. It's already used medicinally in Japan. You heard it here first!
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