Many patients with thyroid disorders (especially hyperthyroidism and patients before radioactive iodine treatment) are often told by their doctors to abstain from iodine. So, what exactly does an iodine ban mean? Simply put, an iodine prohibition means stopping the intake of all substances (including food and medication) that contain iodine as a substance. There are many foods that contain iodine, mainly seafood, such as sea fish, shrimp, crabs, shellfish, kelp, nori, etc. These foods contain a lot of iodine, so it is important to avoid these foods in your daily diet during the iodine ban. Some foods contain iodine in their ingredients, such as wontons, which often contain seaweed and shrimp, so even if you don’t eat them, you will still take them into your body and not be able to prohibit iodine. When you eat, you may not notice. If you can’t buy iodized salt, you can open the salt container to let the iodine evaporate out of the salt. There are also many drugs containing iodine, such as iodine tablets and some traditional Chinese medicines. Patients should carefully read the drug instructions or prescriptions of traditional Chinese medicines to see if there are any iodine preparations or processed seafood products in them, and consult a doctor if you are not sure. Doing a good job of iodine prohibition can be conducive to the recovery of related diseases and can also improve the efficacy of radioactive iodine therapy, so patients who have such requirements should not take it lightly!