Hashimoto's thyroiditis is a type of autoimmune thyroiditis that can manifest as hyperthyroidism, hypothyroidism, or normal thyroid function during its progression. Therefore, there are different requirements for the type of salt to consume depending on the state of thyroid function. When Hashimoto's thyroiditis presents with hyperthyroidism, it is recommended to consume non-iodized salt. When thyroid function is normal in Hashimoto's thyroiditis, iodized salt can be consumed. When Hashimoto's thyroiditis is accompanied by hypothyroidism, there is no specific requirement for consuming iodized or non-iodized salt. Because at this stage, the thyroid has largely lost its ability to synthesize thyroid hormones, and treatment involves replacing them with levothyroxine to maintain thyroid function. Therefore, the intake of iodine does not matter, and one can freely choose to consume iodized or non-iodized salt. Thus, the choice of salt in Hashimoto's thyroiditis should be based on thyroid function testing.