It is harmless, but it is recommended to eat it in moderation. Eating too much is harmful to your health. It is not advisable to eat more; People with poor digestive function and vegetarian spleen deficiency eat less; Loose stool's abdominal pain, lobular hyperplasia of mammary glands and various tumors, and spleen and stomach deficiency and cold should not be eaten. Porphyra is rich in nutrition. Every 100g of dried laver contains 24-28g of protein, 0.9g of fat, 31-50g of carbohydrate, 330mg of calcium, 440mg of phosphorus, 32mg of iron, carotene1.23mg, 2.07mg of riboflavin and 5./.