There are three common antibodies associated with autoimmune thyroid disease: These blood tests measure the amount of proteins that can bind to T3 and T4. They can help determine the cause of a ...

and T3 hormone. The TPO antibody test is considered safe, and the risks associated with it are mild. If you’ve had a previous blood sample taken from your arm, this test will be similar.

The test requires a finger-prick blood sample, and its results are available within a week. At checkout, individuals can choose to add a vitamin D and reverse T3 test to their purchase.