Thyroid Panel Suiteblood
Free T3
Alternative names: FT3, Free Triiodothyronine, Triiodothyronine Free
Clinical Summary
MedlinePlus describes T3 as triiodothyronine, a primary thyroid hormone that is checked to assess hyperthyroidism.
Higher-Than-Range Notes
MedlinePlus notes elevated Free T3 can confirm hyperthyroidism even when Free T4 is normal.
Lower-Than-Range Notes
MedlinePlus notes low Free T3 can be seen in hypothyroidism or severe non-thyroid illness.
Commonly Measured Alongside
Longitudinal Tracking
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General Reference Information: This definition is sourced from public health reference libraries for patient education. It is not intended to substitute professional medical diagnosis, clinical reviews, or treatment plans. Always consult with a qualified health provider regarding your laboratory results.