Here’s what would happen to your body if you started adding purple sweet potatoes to your diet. You’ve probably seen these vibrant, purple-colored potatoes sitting in your grocery store. And let me tell you why they might be one of the healthiest foods on the planet. If we look at Japan, especially Okinawa, home to one of the longest-living populations on Earth, where the average woman lives up to 87 years old, purple sweet potatoes are their staple food. In fact, they make up more than 50% of t