There are many websites that provide information about the nutritional value of a potato, including Idaho Potato, Potatoes Goodness Unearthed and Live Science. Most sites provide nutrition information, health benefits and suggestions for preparation.
Each site offers specific information about the nutrition value, and some may offer additional information about health risks that are associated with consuming potatoes. For example, Live Science acknowledges that a potato is fat free, but explains that a potato is a starchy carbohydrate that offers very little protein.
Potatoes Goodness Unearthed, and Idaho Potato, however, focus more on the potato being a healthful part of a diet. In addition, Idaho Potato provides a chart that compares the nutritional value of a potato to other foods that, like a potato, are high in potassium.