Porphyra contains protein, fat, sugar, calcium, phosphorus, iron, zinc, iodine, manganese, amino acids, phycoerythrin, phospholipids, organic acids, volatile oil, vitamin A, vitamin B 1, vitamin B2, etc. It is sweet, salty and cold, and has the effects of softening phlegm, clearing heat and diuresis. Indications: carbuncle, scrofula, edema and obesity. The Japanese medical community has made a high evaluation of the therapeutic effect of laver: eating more laver has a good therapeutic effect on gastric ulcer; Eating more laver has a good effect on preventing, relieving and treating female climacteric diseases; Eating more seaweed has a good effect on delaying aging, preventing anemia, preventing dandruff and itching, preventing tooth decay, treating night blindness, lowering blood pressure, blood lipid and cholesterol.