The chances of having a low or high rate of thyroid function — hypothyroidism or hyperthyroidism, respectively — increase as you age, according to a 2019 review. The TSH hormone regulates the thyroid ...

Most thyroid tests don’t require any special preparation. However, the radioactive iodine uptake scan requires you to abstain from certain foods and medications for up to several weeks. If a doctor ...

You generally don’t need to fast before a thyroid test, but a healthcare professional may advise you to prepare in other ways. The thyroid gland sits at the front of your neck and helps control your ...

Thyroid blood tests help figure out how well your thyroid gland is working. TSH helps the thyroid gland know when to make ...