Potatoes contain up to 15%-25% sugar, more than all other vegetables, and contain more protein than the average vegetable. Because of its high calorie production, it can also replace part of the staple food. Not only that, it also contains more vitamin C and sodium, potassium, iron, etc., especially the most abundant potassium content, 502 mg of potassium per 100 grams, is a rare high potassium vegetables. Heart disease, especially cardiac insufficiency of patients, have varying degrees of swelling, and often take diuretic drugs, easy to lead to the loss of potassium in the body, accompanied by a tendency to low potassium. Therefore, such patients often eat potatoes, not only to supplement potassium, but also to supplement sugar, protein and minerals, vitamins and so on.