Free T3-Ayumetrix Kit

Note: This is a home collection test kit that will be mailed to you.



Fasting Required: No

Special Instructions: Sample should be collected within the first 30 minutes of waking in the morning.

Specimen: Bloodspot

Results: 5 - 7 business days.

Description: Normally triiodothyronine (TS) circulates tightly bound to thyroxine-binding globulin and albumin. Only 0.3 % of the total T3 is unbound (free); the free fraction is the active form. In hyperthyroidism, both thyroxine (tetraiodothyronine; thyroxine: T4) and T3 levels (total and free) are usually elevated, but in a small subset of hyperthyroid patients (T3 toxicosis) only T3 is elevated.

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.