As early as 1997, the National Nutrition Society called on residents to "eat more vegetables, fruits and potatoes". Nowadays, vegetables and fruits have attracted people's attention, but potatoes are often forgotten. In particular, many people have always mistakenly thought that potato starch content is too high, which is a food that easily leads to obesity, so they are discouraged from potatoes. In fact, judging from the perspective of staple food, the starch content of potatoes is not high, but also helps people lose weight. This is because the water content of potatoes is high, and the starch content is only about 20%, and it is also rich in soft dietary fiber that can produce satiety. Therefore, if potatoes are used instead of white rice and steamed bread, even if you let go of your stomach, it is difficult to make people obese. What needs to be known now is that, as a part of staple food, the content of potassium and magnesium in potato is higher than that in polished white rice and polished white flour, and it is an alkaline food, which is conducive to maintaining the acid-base balance in the human body. Secondly, the protein of potatoes is of high quality and rich in lysine, which can make people get all kinds of amino acids needed by the body. Third, potatoes contain vitamin C, which is a good thing that polished rice and white flour do not have. Fourth, potatoes contain dietary fiber, which is soft and will not irritate the stomach. People suffering from gastric ulcer or enteritis can also eat potatoes with confidence. It should be noted that because potatoes are easy to absorb fat, if you add fat when cooking potatoes, you should cut other foods rich in fat to ensure that the total fat in a day will not exceed the standard.