The total T3 test measures the amount of the hormone triiodothyronine (T3) in your blood. T3 is a hormone produced by the thyroid gland and helps regulate your metabolism and energy production. This test can help diagnose thyroid problems and other conditions related to hormone imbalances.

 T3 (Triiodothyronine) Total is a thyroid hormone test that measures both bound and free T3 in the bloodstream.

Key Characteristics: • Represents approximately 5% of thyroid hormones • Produced partially by thyroid gland • Remaining 80% converted from T4 in peripheral tissues

Clinical Significance: • Helps diagnose hyperthyroidism • Assesses thyroid hormone function • Evaluates metabolic processes

Important Details: • Most biologically active thyroid hormone • 3-4 times more potent than T4 • Shorter half-life compared to T4 • Regulates: • Metabolism • Heart rate • Body temperature • Brain function • Muscle control

Test Specifics: • Measures both bound and free T3 •

Normal adult range: Typically around 100-200 ng/dL • Values above 200 ng/dL suggest hyperthyroidism

The T3 Total test provides healthcare providers with a comprehensive assessment of thyroid hormone levels and potential metabolic dysfunction.