The modern thyroid check — free hormones, measured directly
Other Labs
Starting at $115
+ lab fees
TestWell
$79.99
The Essential Thyroid Panel answers the first thyroid question — is it working? — with the three markers that matter most: TSH (the pituitary's control signal), Free T4 (the storage hormone your thyroid makes), and Free T3 (the active hormone your cells use). Unlike legacy panels that estimate free hormone levels from Total T4 and T3 Uptake, this panel measures the free, bioavailable hormones directly — the modern standard, and unaffected by the binding-protein shifts that skew estimates during pregnancy, on birth control, or with liver conditions. If results point to autoimmune thyroid disease or conversion problems, add TPO Antibodies or Reverse T3 below, or step up to the Complete Thyroid Panel which bundles both.
3-marker thyroid function screen: TSH plus directly measured Free T4 and Free T3. The modern first-line thyroid workup — evaluates pituitary signaling, storage hormone, and active hormone in one draw.
Anyone screening thyroid function for the first time, people with fatigue/weight/temperature/mood symptoms who want more than a TSH-only screen, and anyone on thyroid medication tracking free hormone levels between visits.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days
Biomarkers
3 across 3 tests
3 individual tests · 3 biomarkers measured — each test linked so you can learn more.
No fasting required. Best drawn in the morning at a consistent time when tracking trends. If you take thyroid medication, draw before your morning dose. Stop biotin supplements 72 hours before the draw — biotin interferes with thyroid immunoassays.
No fasting required. Best drawn in the morning at a consistent time when tracking trends. If you take thyroid medication, draw before your morning dose. Stop biotin supplements 72 hours before the draw — biotin interferes with thyroid immunoassays.
Starting at $115 at other labs
TestWell Price
$79.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
Get Complete Thyroid Panel
All 5 tests including all add-ons — save $31.98 vs adding individually
Individual tests that complement this panel
Essential Thyroid Panel
$79.99