T3 is a thyroid test that gives you an insight into how your thyroid is doing. It may be helpful to have a T3 test to measure your levels of free triiodothyronine T3 levels if you have symptoms of thyroid problems, such as hypothyroidism or hyperthyroidism. It may also be appropriate in the follow-up of possible treatment of thyroid disease. It is important to note that free T3 alone is not enough to diagnose thyroid problems and additional testing of free T4 and TSH may be required.
T3 (free triiodothyronine)
Thyroid test T3
How does the blood test take place?



- Measures your levels of free T3 (triiodothyronine).
- Get insight into your thyroid status.
- Detects disturbance in your thyroid hormones
- Indication of hyperthyroidism or hypothyroidism.
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