T3 Free Triiodothyronine
T3 Free Triiodothyronine is a clinical biomarker on the Thyroid panel, reported in pg/mL. Standard reference range: 2.3–4.2 pg/mL. Functional (optimal) range used by integrative practitioners: 2.6–3.8 pg/mL.
What is T3 Free Triiodothyronine?
Free T3 measures biologically active triiodothyronine, the primary metabolically active thyroid hormone at the cellular level, reflecting actual tissue availability.
Reference ranges
| Range type | Value (pg/mL) | Source |
|---|---|---|
| Standard (lab) | 2.3–4.2 | Typical Quest / LabCorp adult reference |
| Functional (optimal) | 2.6–3.8 | Integrative / functional medicine consensus |
How SomaVue interprets T3 Free Triiodothyronine
SomaVue maps every result for T3 Free Triiodothyronine against four clinical lenses — nutrient cofactors, toxin exposure, infection drivers, and circadian/hormonal context — and connects each interpretation to specific peer-reviewed citations. Pre-mapped clinical reasoning and cross-marker pattern detection are available inside the practitioner workspace.
See the full interpretation
Upload a patient PDF or enter values manually to see the four-lens analysis, cross-marker patterns, and cited evidence for T3 Free Triiodothyronine and 205 other markers.
Try it freeEducational reference only. Reference ranges vary by laboratory, assay method, age, sex, and clinical context. Functional ranges represent integrative-medicine consensus and are not regulatory thresholds. SomaVue does not diagnose, treat, mitigate, or prevent disease. Always consult a licensed healthcare provider.