1. Purple Sweet Potato
No food coloring here! Yep, purple sweet potatoes have naturally vibrant flesh. Though you may come across sweet potatoes with purplish skin at your local supermarket, these babies have purple insides, too. The color comes from anthocyanins, a pigment that also gives grapes, blueberries and red cabbage their distinct hues. Also known as Okinawan sweet potatoes, these tubers are rich in antioxidants. They are relatively hard to find outside of Asia and Hawaii, but your best bet is to check out Asian supermarkets.
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