Total T3, Serum

Total triiodothyronine (T3) is a thyroid hormone that regulates Metabolism and energy. The total T3 test helps diagnose thyroid function disorders such as Hyperthyroidism and Hypothyroidism. Total T3 function: Triiodothyronine (T3) is an active hormone produced by the thyroid gland that regulates Metabolism, energy levels, and body temperature. T3 circulates in the blood in two forms: protein-bound (total T3) and free (free T3). The total T3 test measures both bound and free forms, helping to determine the overall T3 levels in the body.
Test significance: The total T3 test is used to assess thyroid function and diagnose conditions such as Hyperthyroidism (overactive thyroid) and Hypothyroidism (underactive thyroid). This test may be useful in cases where free T4 levels are normal, but Thyroid dysfunction is suspected.
Diseases: Elevated total T3 levels may indicate Hyperthyroidism, while low levels may suggest Hypothyroidism or other thyroid problems.