There is no absolute dietary contraindication for hypothyroidism, but hypothyroidism may be triggered by either too low or too much iodine intake, and it is recommended to decide whether or not to consume iodized salt according to whether or not there is iodine deficiency. Iodized salt is generally acceptable for hypothyroidism, especially for those with iodine-deficiency hypothyroidism, who are encouraged to increase their iodine intake by iodizing salt. However, studies have shown that long-term excessive iodine intake, especially in people with autoimmune thyroid disease, can lead to hypothyroidism, and it is recommended that such people avoid excessive iodized salt intake. People with hypothyroidism should follow the doctor’s instructions to take levothyroxine sodium tablets for replacement therapy, and regularly review the thyroid function, and it is not recommended to stop or change the dosage of the drug without authorization. It is not recommended to stop the medication or change the dosage without authorization. If any discomfort occurs during the medication period, it is recommended to consult a doctor promptly.