Description

We know that the thyroid gland makes thyroid hormones like T3 and T4. The thyroid gland consistently releases these hormones in our body. So the blood test determines the number of hormones produced by the gland.

A blood test finds out the amount of TSH, T3, and T4 in our blood. Some thyroid hormones are bound for certain proteins in the blood and only unbound thyroid hormones are active and effective. These free thyroid hormones are called FT3 and FT4(F stands for free).