Kelp cold need to be cooked, kelp has gelatinous, the fresher the kelp or the closer the kelp root part of the gelatinous more abundant, are kelp itself beneficial components, so if the whole piece of kelp cleaned and cooked before shredding is better.

According to research, dry kelp soaked for 15 minutes, 85.9% of the iodine dissolved in water, soaked for 40 minutes, 80% of the mannitol was dissolved. If soaked for a few hours or even a few days, the two nutrients in the kelp will be little left, the rest is just kelp gum and cellulose. It can be seen that kelp should not be soaked for a long time, generally 5 to 10 minutes is appropriate.