Thyroid Profile Free (FT3, FT4 & TSH)

A Thyroid Profile Free (FT3, FT4 & TSH) test offers a series of blood tests that measure the levels of free form of thyroid hormones in the blood. This test is used to identify the functioning of the thyroid gland and measure the levels of thyroid-stimulating hormone (TSH), free thyroxine (FT4), and free triiodothyronine (FT3).