2, kelp has gum, the fresher kelp or the more gum is near the kelp root, which are beneficial components of kelp itself, so it is better to shred the whole kelp after cleaning and cooking.

3. According to the research, 85.9% of iodine was dissolved in water after soaking dried kelp for 0/5 minutes, and 80% of mannitol was dissolved after soaking for 40 minutes. If soaked for several hours or even days, there will be little of these two nutrients left in kelp, leaving only kelp gum and cellulose. It can be seen that kelp should not be soaked for a long time, and it is generally suitable for 5 to 10 minutes.