The disadvantage is to eat foods containing high iodine to supplement the fastest, iodine-containing quite high food mainly includes kelp, nori, and seafood, these foods are relatively high in iodine content, iodine-deficient patients eat properly, to supplement the iodine deficiency is helpful. The best salt to use is iodized salt, which is also helpful for iodine supplementation. By supplementing iodized salt as well as food, iodine deficiency may be significantly improved in a relatively short period of time. However, patients should go to the hospital regularly to monitor the level of urinary iodine. If the urinary iodine is low, you can continue to supplement iodized food and iodized salt. If the urine iodine level is significantly higher, the rate of iodine supplementation should be controlled to prevent excessive iodine intake from causing goiter or hyperthyroidism.