Kelp has a high nutritional value and is rich in iodine and other mineral elements, but the following people are not recommended to eat kelp: 1, hyperthyroidism patients: the thyroid gland is an important endocrine organ of the body, involved in the regulation of important functions in the body, as kelp is rich in iodine, the thyroid gland can absorb iodine to synthesize thyroid hormones, but if too much iodine intake, will aggravate hyperthyroidism However, if too much iodine is consumed, it will aggravate the condition of hyperthyroidism. Therefore, it is not recommended to consume kelp in order to avoid aggravating the condition. In addition to kelp, patients with hyperthyroidism should also avoid other iodine-rich foods, such as seaweed, seaweed and seafood. 2. Pregnant and lactating women: Since kelp is rich in iodine, when pregnant or lactating women consume large amounts of kelp, the iodine in the kelp can enter the fetus through the blood circulation, causing an increase in iodine content in the fetus and thus affecting the fetal thyroid function. It is not recommended for pregnant or lactating women to consume large amounts of kelp; 3, kelp allergy or allergic person: allergy or allergic person to kelp is not recommended to consume kelp, which may cause minor allergic reactions, such as itchy skin, allergic dermatitis, etc.; 4, stomach cold or gastroenteritis people: in Chinese medicine, kelp belongs to cold food, large amounts of kelp consumption can aggravate gastrointestinal discomfort, such as diarrhea, abdominal pain, etc. In short, kelp has a high nutritional value, most people can eat, but should not be consumed in large quantities, in moderation.