If your healthcare provider has ordered a T4 test, you may wonder what it is. Thyroxine is another name for T4, which is one of the two main types of thyroid hormone the thyroid gland makes. The other ...

This thyroid test analyzer will help you understand your TSH, T3, T4, and other thyroid function test results. Select a test and enter your lab value to learn more. What information do I need in order ...