Non-Malaysian citizens are subject to 6% SST, to be verified and paid at the counter before screening.
Free T3 (FT3, Free Triiodothyronine) is the active thyroid hormone circulating in the blood, directly influencing metabolism, energy regulation, and cardiovascular function. Unlike total T3, FT3 measures the unbound, biologically active fraction, providing a more accurate reflection of thyroid function.
A venous blood sample is collected to measure serum FT3 levels. Doctors interpret results in combination with FT4, TSH, and clinical symptoms.
Q1: What’s the difference between FT3 and FT4?
A: FT3 is more active but present in lower concentrations, while FT4 is more abundant and can be converted into FT3.
Q2: What does abnormal FT3 mean?
A: Elevated FT3 usually indicates hyperthyroidism, while low FT3 suggests hypothyroidism or reduced thyroid activity.
Q3: Why test FT3 along with FT4 and TSH?
A: The combination provides a complete evaluation of thyroid secretion and regulation, aiding diagnosis and monitoring.