Eat kelp substances are as follows: 1, iodine, because kelp as a plant in the ocean is rich in iodine, for the treatment of thyroid nodules, goiter has very important benefits; 2, rich dietary fiber, kelp contains a very rich amount of dietary fiber, can promote intestinal peristalsis, promote defecation, in the prevention and treatment of constipation is very effective; 3, from the Chinese medical food therapy, kelp into the liver, stomach and kidney meridian, by eating kelp has a very good liver, stomach, kidney role.