Even if the salted Undaria pinnatifida produces mucus when soaking in water, it can be eaten normally. The mucus produced by Undaria pinnatifida is polysaccharide such as alginic acid and alginate produced by Undaria pinnatifida under photosynthesis, which is harmless to human body and edible in theory.

Undaria pinnatifida is rich in trace elements and minerals, such as essential amino acids, calcium, iodine, zinc, selenium, folic acid and vitamins A, B and C.

Undaria pinnatifida is called "the king of calcium supplementation" and "the expert of zinc supplementation", and its calcium content is 10 times that of milk and zinc content is 3 times that of beef.

The excavation of the site unearthed in Beizhong fully confirmed that the Japanese had been eating seaweed since BC. Up to now, the Japanese have been eating seaweed for more than 2000 years.