2. Compared with green leafy vegetables, kelp is rich in vitamin C, and its content of crude protein, sugar, calcium and iron is several times or even ten times higher.
3. Kelp is a kind of seaweed with high iodine content. Generally, cultured kelp contains 3%~5% iodine, and as much as 7%~ 10%.
4. Fresh kelp is 95% water and 3% dietary fiber, and its calorie is very low.
5. Kelp also contains a lot of mannitol.