The free, active fraction of the T3 thyroid hormone, reflecting what tissues can actually use.
$9.90
Every order site, cheapest first
All-in = the test price plus that site's one-time blood-draw or order fee. 5 of these sites have changed this price since our June baseline. Always confirm on the vendor's own site before ordering.
| Order site | Performing lab | Test | Draw fee | All-in | Status |
|---|---|---|---|---|---|
| Fitomics · Insider · LabCorp ↗ | LabCorp | $9.90 | - | $9.90 | verified |
| Fitomics · Insider · Quest ↗ | Quest | $9.90 | - | $9.90 | verified |
| DrSays · Subscription · LabCorp ↗ | LabCorp | $9.99 | - | $9.99 | verified |
| Fitomics · Insider · BioReference ↗ | BioReference | $13.90 | - | $13.90 | verified |
| Dirt Cheap Labs · LabCorp ↗ | LabCorp | $7.25 | $10.00 | $17.25 | verified |
| Dirt Cheap Labs · Quest ↗ | Quest | $7.48 | $10.00 | $17.48 | verified |
| DrSays · No Sub · LabCorp ↗ | LabCorp | $9.99 | $9.99 | $19.98 | verified |
| GoodLabs ↗ | Quest / LabCorp / BioReference | $10.00 | $12.00 | $22.00 | verified |
| Marek · Quest ↗ | Quest | $20.00 | $10.00 | $30.00 | verified |
| Fitomics · Outsider · LabCorp ↗ | LabCorp | $11.90 | $20.00 | $31.90 | verified |
| Fitomics · Outsider · Quest ↗ | Quest | $11.90 | $20.00 | $31.90 | verified |
| Fitomics · Outsider · BioReference ↗ | BioReference | $14.90 | $20.00 | $34.90 | verified |
| JasonHealth · Quest ↗ | Quest | $20.00 | $18.00 | $38.00 | verified |
| M&M Labs and Diagnostics · LabCorp ↗ | LabCorp | $31.00 | $8.00 | $39.00 | verified |
| Ulta Lab Tests · Quest ↗ | Quest | $27.95 | $12.95 | $40.90 | verified |
| OwnYourLabs · LabCorp ↗ | LabCorp | $43.20 | $6.00 | $49.20 | verified |
| WalkInLab ↗ | LabCorp / Quest | $59.00 | - | $59.00 | verified |
| Grass Roots Labs · Quest ↗ | Quest | $32.22 | $28.00 | $60.22 | verified |
| DiscountedLabs · Quest ↗ | Quest | $71.00 | $8.00 | $79.00 | verified |
| LabCorp OnDemand · LabCorp ↗ | LabCorp | $89.00 | - | $89.00 | verified |
| PrivateMDLabs ↗ | LabCorp / Quest | $91.00 | - | $91.00 | verified |
Related tests
Prices are collected periodically and can change or lapse. This is a research and education resource, not medical advice. Pricing framework and source data compiled by PedroDaGr8, reproduced with permission.