Falai, alias Dimao, is the algae body of Nostoc flagelliforme. Every100g of falai contains water13.8g, protein 20.3g, carbohydrate 56.4g, calcium 2560mg and iron 200mg. In addition, it also contains carotene, chlorophyll, phycocyanin, amino acids and trace elements. Nostoc flagelliforme is sweet, cold and non-toxic. Enter the liver, kidney and bladder meridians. It has the effects of clearing away heat, resolving stagnation, softening hard mass, resolving phlegm, regulating intestine, removing scale, removing toxic substances, nourishing, relaxing bowels, promoting diuresis, eliminating dampness, eliminating stagnation and lowering blood pressure. According to Chinese medicine books, Nostoc flagelliforme has certain curative effects on goiter, lymphoid tuberculosis, beriberi, nosebleed, iron deficiency anemia, hypertension and gynecological diseases (1). Nostoc flagelliforme has a strong function of regulating qi, and it is fat-free. It is a "thin thing" of delicacies, which can resolve phlegm and soften hardness, clear lung and relieve cough, and can be used as an adjuvant treatment for lipoma and obesity. (2) Lowering blood pressure, regulating the effective components of Nostoc flagelliforme can lower blood pressure, induce diuresis and regulate nerves, which is an ideal food for patients with hypertension, coronary heart disease and hyperlipidemia. (3) Clearing intestines and removing scales, detoxifying and nourishing Nostoc flagelliforme is rich in protein, calcium and iron, which are higher than those of pigs, cattle, mutton and eggs, and has the effects of clearing intestines and removing scales, detoxifying and nourishing, and discharging pollutants and relaxing bowels. (4) Strengthening the body Nostoc flagelliforme can provide rich nutrients for human body, and it has a certain curative effect on diseases such as anemia, chronic bronchitis and cancer in the elderly.