FT3

About Test

The FT3 (Free Triiodothyronine) test measures the level of free triiodothyronine, a thyroid hormone, in the blood. Triiodothyronine (T3) is crucial for regulating metabolism, growth, and energy levels. Unlike total T3, which measures both bound and free T3, the FT3 test specifically assesses the unbound, active form of the hormone that is available to cells.

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 FT3 may indicate hyperthyroidism or conditions such as thyroiditis or certain types of thyroid cancer. Low levels of FT3 can suggest hypothyroidism, where the thyroid gland is not producing enough hormones.

Monitoring FT3 levels helps healthcare providers assess thyroid health, diagnose thyroid disorders, and guide appropriate treatment strategies to manage thyroid function effectively and maintain overall well-being. Regular testing is important for adjusting treatment plans and ensuring optimal thyroid hormone levels.