Free T3 (Triiodothyronine) Test at home in Bengaluru
The free T3 test measures the active, unbound form of triiodothyronine, one of the two main hormones your thyroid produces. It is usually ordered alongside TSH and free T4 for a fuller picture of thyroid function.
- Price
- ₹349
- Fasting
- Not needed
- Category
- Thyroid
- Results
- During your visit
What the Free T3 Test measures
Triiodothyronine (T3) is a thyroid hormone that drives metabolism throughout the body. Most T3 in the blood is bound to proteins; the small "free" fraction is the biologically active part, which is what this test measures.
Why it's done
- Investigating symptoms of an overactive thyroid alongside TSH and free T4
- Clarifying thyroid function when TSH results are unclear
- Monitoring known thyroid conditions, on medical advice
How to prepare
No fasting is needed — eat and drink normally. Wear something with sleeves that roll up easily, and keep a list of any medicines you take handy for your phlebotomist.
Understanding your result
Your report shows your free T3 level with the reference range. It is usually read together with TSH and free T4 rather than on its own, so bring all three results to your doctor.
Frequently asked questions
Do I need to fast for a free T3 test?
No, this test does not require fasting.
Should T3 be tested on its own?
Most doctors order T3 alongside TSH and T4 rather than alone, since the three together give a clearer picture of thyroid function.
Related tests
This page is general information, not medical advice, and a test result is not a diagnosis. Always discuss your results with a qualified doctor. All tests