Porphyra culture in Xiangshan has a history of more than 30 years, and the county's culture area is10.6 million mu, which is one of the leading products of marine culture. With the improvement of aquaculture technology and the increase of market demand, the aquaculture area has expanded year by year, forming a larger production scale. At present, the county's breeding area is 1.6 million mu, and more than 3,500 tons of dried laver are produced. In the past, after fresh vegetables were harvested, most of them were made into vegetable cakes by hand and dried in the sun. In recent years, mechanical processing has been developed, and the product grade has been improved. The vegetable cakes are thin, tender, bright, fragrant and clean.
Porphyra is rich in vitamins and minerals, especially vitamins B 12, B 1, B2, A, C, E, etc. It contains protein about the same as soybean and six times as much as rice. Vitamin A is about 67 times that of milk, riboflavin is 9 times that of mushrooms and vitamin C is 70 times that of Chinese cabbage. It also contains choline, carotene, thiamine, nicotinic acid, vitamin C, iodine and so on. It has many functions such as clearing away heat and promoting diuresis, tonifying kidney and nourishing heart, lowering blood pressure and promoting human metabolism.
Porphyra is rich in EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid), which can prevent human aging; It contains a lot of taurine, which can reduce harmful cholesterol and help protect the liver. 1/3 of laver is dietary fiber, which can keep intestinal health and excrete carcinogens, especially beneficial to the prevention of colorectal cancer. The trace polysaccharide it contains proves that it has the effect of inhibiting cancer. Because laver is rich in choline, eating laver often can improve memory loss.
Porphyra has been eaten in China for more than 1000 years. Porphyra is often used as postpartum lotion for women; Patients with lung abscess and expectoration can often chew dried laver; Eating more seaweed in summer can relieve summer heat and replenish the body.