Kelp is a kind of seaweed with high iodine content. Generally, the iodine content of cultured kelp is 3 ~ 5 ‰, which can reach 7 ~ 10 ‰. Iodine and alginic acid extracted from it are widely used in medicine, food and chemical industry. Iodine is one of the essential elements for human body. Iodine deficiency can lead to goiter. Eating kelp can prevent this disease, prevent arteriosclerosis and reduce the accumulation of cholesterol and fat.

Koreans pay great attention to diet therapy. When they see whales injured, they will look for seaweed food to heal the wounds, so they use sea belts to recuperate their bodies. According to years of experience, they think kelp can help pregnant women purify their blood and fight against tooth loss and hair loss. Therefore, Korean women will drink seaweed soup for three months after giving birth, and then drink a bowl of seaweed soup on their birthdays to commemorate their mothers' painful childbirth.

Korean seaweed soup tastes very light. There are two ways to add beef or clams. Adding beef will strengthen the body and help reduce the coldness of kelp, and adding clams will make the taste more fresh and sweet. Now only traditional Korean restaurants have this soup. They sell more kelp clam soup because it tastes fresh and sweet.