The role of nori is as follows: 1. It can supplement the body with rich iodine, which can promote the synthesis of thyroxine, and has a very obvious effect in regulating the metabolism of the body. 2. It can dissolve phlegm and soften the firmness, and for people with cough, cough, thyroid nodules and goiter, proper consumption of nori has a very good effect in dissolving phlegm and softening the firmness and relieving the above symptoms. 3. Insomnia, poor sleep quality, appropriate consumption of nori has a very good effect of nourishing the heart to remove annoyance, improve the quality of sleep.