Blood tests are used in routine screening to determine thyroid hormone levels, namely thyroid-stimulating hormone (TSH), free thyroxine (T4), and free triiodothyronine (T3).

These tests analyze specific thyroid-related biomarkers in the blood or saliva to provide valuable insights into how your thyroid gland is functioning.

Learn more about the best at-home blood tests here. Best At-Home Blood Tests: A 2025 Guide. ... determining thyroid gland function and detecting infections like COVID, flu, ...

Medicare typically covers thyroid function blood tests, including a TSH blood test. Learn more about thyroid testing, parts of Medicare that may pay for it, and what you can expect.

Blood tests are an important part of routine diagnostic evaluation when it comes to your health. A prime example is the ...

Normal blood test ranges. Depending on the lab that analyzed your sample, the results from your blood test may be broken down into individual tests or collections of related tests called panels ...

I have yearly blood tests due to a thyroid condition. I take Synthroid daily. I also take 2000 mcg of biotin twice a day, because my nails were peeling and splitting.

They are typically noncancerous. Doctors often use blood tests as a first step in diagnosing pituitary tumors. The pituitary gland is a tiny, pea-sized gland at the base of the brain.