1. Residents in non-iodine deficient areas should not eat iodized salt, especially in coastal areas like Changhai County, which eat a lot of seafood (rich in iodine).
2, hyperthyroidism patients, regardless of gender, because iodine will stimulate the synthesis of thyroid hormones.
3. Urban residents with thyroid nodules found in physical examination (because most cities have eliminated the "big neck disease"-endemic goiter caused by iodine deficiency, when urban residents find thyroid nodules, the possibility of iodine deficiency is extremely small, and the possibility of iodine excess is very high).
4, patients with thyroiditis (Hashimoto's disease), iodine will stimulate inflammation.
5. Patients with thyroid tumors (whether they have had surgery or not).
6 patients with thyroid cancer (except those who have undergone total thyroidectomy).
7. Patients with hypothyroidism were once controversial, but now they tend to limit iodine intake.
8. Other thyroid diseases (in fact, there is only one thyroid disease-big neck disease needs iodine supplementation, and the rest of thyroid diseases do not need iodine supplementation, otherwise it may be counterproductive).