
Frequently Asked Questions
Understand Our Tests
What does the Thyroid Panel test for?
The panel measures TSH, T-4 (Total Thyroxine), Free T-4 (Free Thyroxine), Thyroid Peroxidase Antibodies (TPO), and Thyroglobulin Antibodies (Tg-Ab). These markers help assess thyroid function, hormone balance, and potential autoimmune thyroid conditions.
Why is TSH important?
TSH regulates thyroid hormone production. High TSH may indicate hypothyroidism (underactive thyroid), while low TSH may indicate hyperthyroidism (overactive thyroid). Proper TSH levels are essential for metabolism, energy, and overall hormonal balance.
What do thyroid antibodies (TPO and Tg-Ab) indicate?
Elevated TPO or Tg-Ab antibodies may signal autoimmune thyroid conditions, such as Hashimoto’s thyroiditis or Graves’ disease. These tests can also help monitor patients with thyroid cancer or conditions that affect thyroid hormone production.
How do T-4 and Free T-4 differ?
T-4 measures total thyroxine, including protein-bound hormone, while Free T-4 measures the unbound, biologically active hormone. Free T-4 provides a more accurate reflection of thyroid function, particularly when binding proteins are altered.
Who should consider thyroid testing?
Testing is recommended for individuals experiencing unexplained weight changes, low energy, temperature sensitivity, mood changes, joint or muscle issues, memory problems, or if trying to conceive. Women are at higher risk for thyroid disease, making testing particularly important during pregnancy planning.