The main effect of low urinary iodine is the functioning of the thyroid gland, leading to the development of thyroid disorders. For example, thyroid nodules, thyroid adenomas, reduced thyroid function, etc. Iodine is essential for the synthesis of thyroxine. Iodine is essential for the synthesis of thyroxine, and insufficient or excessive iodine intake can lead to thyroid dysfunction. Kidney is the main excretory organ of iodine, and 90% of iodine is excreted in urine and 10% in feces. It is recommended to supplement iodine in a timely manner, which can be regulated by dietary supplementation of iodine-rich foods, such as kelp and seaweed, which can help supplement the absorption of iodine.