Free T3 (FT3) Test in Bangalore
Measures unbound triiodothyronine (FT3) circulating in blood to evaluate thyroid function, particularly suspected hyperthyroidism and T3 toxicosis.
Thyroid & Endocrinology
Free T3 Quantitative
Serum
Same Day (6 Hours)
Preparation & Fasting Instructions
Clinical Overview
Free T3 measures the unbound fraction of triiodothyronine circulating in blood. T3 is one of the principal thyroid hormones and has important effects on metabolism, heart rate, temperature regulation and energy use.
FT3 is generally interpreted together with TSH and Free T4. It is particularly useful in selected patients with suspected hyperthyroidism when T3 concentrations may rise disproportionately.
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Frequently Asked Questions
Q: What is Free T3?
A: Free T3 measures the active, unbound triiodothyronine hormone circulating in your blood.
Q: What is the difference between T3 and Free T3?
A: Total T3 measures both bound and unbound hormone; Free T3 measures only the biologically active unbound fraction.
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