Radionuclide iodine (I-131)

Iodine-131 (I-131) is a radioactive form of the element iodine used in medical treatments, primarily for thyroid conditions like cancer or overactive thyroid disease. When administered, it emits radiation that selectively targets thyroid cells, destroying abnormal tissue while sparing most other parts of the body. I-131's radioactivity helps doctors to reduce or eliminate diseased thyroid tissue effectively. Because the thyroid naturally absorbs iodine, using this radioactive form allows for targeted therapy. It is administered in controlled doses and precautions are taken to limit radiation exposure to others, making it a valuable tool in endocrine treatment.