The vitamin content of potatoes is twice that of carrots, three times that of Chinese cabbage and four times that of tomatoes, and the vitamin C content is the highest among vegetables. Experts found that in the former Soviet Union, Bulgaria, Ecuador and other famous longevity towns, people's staple food is potatoes.

In addition to protein, potatoes are also rich in carbohydrates, up to 16.8g per 100g, and are rich in vitamin C, vitamin A, vitamin B 1B2 and minerals such as calcium, phosphorus and iron. At the same time, it also contains vitamin B6, which can prevent arteriosclerosis. So eating potatoes often can reduce the incidence of cerebral hemorrhage.

Potatoes are rich in potassium, with 502 mg in100g, so they are called high-potassium vegetables. Potassium in human body can strengthen the excitability of muscles, maintain the rhythm of heartbeat and protect myocardium. Potassium is the bane of sodium, which can prevent the increase of blood pressure caused by high salt intake and has obvious antihypertensive effect.