Potatoes are nutrient-dense, non-fattening, and have a reasonable amount of calories. They help to maintain the blood glucose level and keep the brain alert and active. Include them in your regular meals so that the body receives a good supply of carbohydrates, dietary fibers, and essential minerals such as copper, magnesium, and iron. Potatoes should never be kept under direct sunlight as they turn green due to the chlorophyll produced, releasing toxic substances. It is best not to refrigerate potatoes as it adversely affects the taste. Instead, it's best to store them in paper bags.