FT4

About Test

The FT4 (Free Thyroxine) test measures the level of free thyroxine, a key thyroid hormone, in the blood. Thyroxine (T4) is produced by the thyroid gland and plays a crucial role in regulating metabolism, growth, and energy levels. Unlike total T4, which includes both bound and free forms of the hormone, the FT4 test specifically measures the unbound, active form of T4 that is available to the body's tissues.

This test is used to evaluate thyroid function and diagnose conditions related to thyroid hormone imbalances, such as hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid). Elevated levels of FT4 may indicate hyperthyroidism or thyroiditis, while low levels of FT4 are often associated with hypothyroidism.

Monitoring FT4 levels helps healthcare providers assess thyroid health, diagnose thyroid disorders, and guide treatment strategies to manage thyroid function effectively. Regular testing is important for adjusting treatment plans and ensuring that thyroid hormone levels are maintained within the optimal range for overall well-being.