Nori is a food with high nutritional value, rich in iodine, calcium, potassium, dietary fiber and other nutrients. Nori in the iodine, potassium and other high content, can supplement the human body needs a variety of minerals and electrolytes. Iodine content per 100g of purple cabbage is about 4323 micrograms, in the food iodine content is very front, for iodine deficiency of endemic goiter patients to eat more purple cabbage for the improvement of the condition has a certain degree of help. Every 100g of purple cabbage contains 356mg of potassium, hypokalemia patients can also eat more purple cabbage to supplement potassium. Daily dietary intake of seaweed can also supplement the human body enough dietary fiber and other nutrients, especially dietary fiber for the promotion of gastrointestinal tract peristalsis, constipation patients can be appropriate to eat more.