Most noodles in North Korea use buckwheat flour, which is rich in nutrition and has certain health care function. Buckwheat is rich in starch, protein, amino acids, vitamin P, vitamin B 1, B2, total flavonoids, rutin and other nutrients. The vitamin P contained in it has a protective effect on blood vessels, especially rutin, which can promote cell proliferation, prevent blood cell aggregation, reduce blood lipid and dilate coronary arteries.