There’s a lot more worthwhile information in the article but the bottom line is this.
Colorful potatoes, such as purple potatoes and sweet potatoes, have the most nutrients. And if the Okinawans are any indication, they can make a considerable contribution to your long-term health.
However, if you are diabetic or struggling with weight issues, you may want to limit your intake of white or russet potatoes. For most people, whole potatoes (especially sweet potatoes) can make a valuable and affordable contribution to a healthy, balanced diet. But no matter how you eat them, it’s best to avoid them fried, processed, or covered in unhealthy toppings.