Gexianmi contains 15 amino acids, 7 of the 8 amino acids needed by human body, and the total protein of dry matter is as high as 52-56%. The content of vitamin C is close to that of fresh jujube, and the ratio of vitamin B 1 and B2 is higher than that of common bacteria and algae, and it contains 15 minerals: phosphorus, sulfur, calcium, potassium, iron, strontium, yttrium and so on. There are also sugars such as algae starch. Protein is higher than soybean, calcium content is rare in vegetables, carbohydrate is higher than many vegetables, and it provides moderate calories, so it is an excellent natural healthy food. Traditional Chinese medicine believes that Gexianmi is sweet, light and cold in nature, and has the functions of clearing away heat and improving eyesight, astringing and benefiting qi, and can treat red eyes, night blindness, rectocele and burns.