potatoes are stems.

What plants grow underground is called roots, and what plants grow on the ground is called stems, but potatoes are different. Potatoes are tubers, which are formed by the swelling of the heads of stolons. In addition to potatoes, plants like sweet potatoes, cassava and yam are also the same. What grows underground is stems. Potato, also known as potato, potato, ground egg, etc., is called the five major crops in the world together with corn, wheat, sorghum and rice. Potatoes have a long history, originated in the Andes of South America, and then introduced to China. Potatoes are grown in most parts of China.

Nutritional value of potatoes

Potatoes are rich in nutrients, and their rich vitamin C (ascorbic acid) content far exceeds that of grain crops; Its high content of protein and sugar greatly exceeds that of ordinary vegetables. Potatoes have complete nutrition and reasonable structure, especially the molecular structure of protein is basically the same as that of human body, which is easily absorbed and utilized by human body, and its absorption and utilization rate is almost as high as 1%. Some nutritionists have pointed out that "you can get all the nutrients you need by eating potatoes and whole milk every meal". It can be said that "potatoes are nutritious foods close to the full price."

Potatoes are rich in carbohydrates, plant protein, vitamin C, carotenoids and dietary fiber, and each 1g of potatoes contains 52mg of potassium, which is a rare high-potassium food and helps to lower blood pressure. Carotenoids are natural antioxidants, which can protect the heart and scavenge free radicals. Therefore, patients with poor heart function, hypertension and hyperlipidemia can eat more potatoes appropriately, which is good for cardiovascular health. Potatoes are best eaten by steaming, which can retain nutrients including vitamin C to the maximum extent, and starch granules are fully gelatinized, which is easier to be digested and decomposed, which helps to reduce the burden on the gastrointestinal tract. It is not recommended to eat potatoes as a dish to avoid excessive intake of carbohydrates.