Iodine is the main raw material for the thyroid gland to synthesize thyroxine. It can be taken up and concentrated by the thyroid follicular epithelium and is used to determine thyroid function, image functional thyroid tissue, treat hyperthyroidism, and treat metastatic lesions after thyroid cancer resection. Most of 131I is excreted from the body through urine, and the remaining part is concentrated in the thyroid tissue. The thyroid gland needs about 70-100 mu;g of iodine per day to synthesize thyroid hormones.

Iodine is the main raw material for the thyroid gland to synthesize thyroxine, and can be taken up and concentrated by the thyroid follicular epithelium. Larger doses of 131I can destroy thyroid tissue and reduce the formation of thyroxine, and are used to treat hyperthyroidism. Even larger doses are suitable for the treatment of metastatic lesions after thyroid cancer resection. After iodine enters the blood, normally 10% to 25% is taken up by the thyroid gland, and the concentration in the thyroid gland can reach 25 to 500 times the plasma concentration. The uptake can be increased when stimulated by thyroid stimulating hormone (TSH), and most of the iodine participates in the synthesis of thyroxine in the thyroid gland.

Iodine is the main raw material for the thyroid gland to synthesize thyroxine, and can be taken up and concentrated by the thyroid follicular epithelium. Most of the 131I is excreted from the body through urine within 24 hours, and the remaining part is almost entirely concentrated in the functional thyroid tissue, which can be used to determine thyroid function, thyroid imaging, treatment of hyperthyroidism, and treatment of metastatic lesions after thyroid cancer resection. The intake can be increased when stimulated by thyroid stimulating hormone (TSH), and most of the iodine participates in the synthesis of thyroxine in the thyroid gland.

Iodine is the main raw material for the thyroid gland to synthesize thyroxine. It can be taken up and concentrated by the thyroid follicular epithelium and is used to determine thyroid function, image functional thyroid tissue, treat hyperthyroidism, and treat metastatic lesions after thyroid cancer resection.

After intravenous injection, this product immediately enters the kidney with the blood flow and is quickly cleared by the kidney. 80% of it is secreted by the renal tubules without reabsorption, and 20% is filtered by the glomerulus. The o-iodine hippurate sodium that passes through the nephron is flushed to the renal calyx and renal pelvis through the collecting duct and discharged into the bladder through the ureter. 30 minutes after intravenous injection, the amount of o-iodine hippurate sodium in the urine can reach 70% of the injected amount.