1. Porphyra haitanensis contains protein, sugar, fat, carotene, vitamin B 1, B2, C, nicotinic acid, calcium, phosphorus, iron and iodine. , but also contains α-\. Terpene, geraniol, carvone, furfural, valeric acid, lipoic acid, choline, phospholipids and glycerides. Eicosatetraenoic acid, lutein, zeaxanthin, phycoerythrin and phycocyanin. It also contains allophycocyanin and amino acids, mainly glutamic acid, alanine and aspartic acid.

2. Porphyra yezoensis contains 18 amino acids, among which alanine, glutamic acid and aspartic acid are the highest, and others are leucine, valine, lysine and threonine. In addition, it also contains cholesterol galactoside, cholesterol mannoside, palmitoyl cholesterol galactoside, palmitoyl cholesterol mannoside, R- phycoerythrin, carotene, vitamin B 1, B2, C, nicotinic acid, protein, calcium, phosphorus and iron. In addition, it also contains laver polysaccharide and galactan.

3. Porphyra yezoensis contains lipopolysaccharide (LPS), vitamin B 12, arsenic (As), riboflavin, nicotinic acid, thionine, choline, alanine, glutamic acid, aspartic acid and other amino acids, β-carotene, α-carotene, lutein and zeaxanthin.

Porphyra is sweet, salty and cold, and has the effects of resolving phlegm, softening hardness, clearing away heat and promoting diuresis, tonifying kidney and nourishing heart. Used for goiter, edema, chronic bronchitis, cough, beriberi, hypertension, etc.