1, kelp can't be eaten as a staple food, and kelp can't be eaten as a staple food for a long time, which will cause excessive iodine intake and affect your health. Moreover, kelp contains a certain amount of arsenic, and excessive intake of arsenic will cause poisoning. Therefore, before eating kelp, wash it with water and let arsenic dissolve in water.
2, kelp can not be soaked for a long time, because the soaking time is too long, the nutrients in kelp, such as water-soluble vitamins and inorganic salts, will also be dissolved in water, and the nutritional value will be reduced. If kelp is as tough as boiled after soaking in water, it means it has gone bad and can't be eaten any more. Traditional Chinese medicine believes that kelp is cold, and people with spleen and stomach deficiency are forbidden to eat.
3. Don't drink tea immediately after eating kelp, and don't eat sour fruit immediately, because kelp is rich in iron, and the above two foods will hinder the absorption of iron in the body.