Triiodothyronine (T3) Free

The Free Triiodothyronine (T3) test measures the level of free T3, the unbound and biologically active form of the T3 hormone, in the blood. T3 is a thyroid hormone that plays a crucial role in regulating metabolism, growth, and development. This test is used to assess thyroid function and diagnose thyroid disorders such as hyperthyroidism and hypothyroidism.

Sample type:

Serum

Preparation:

You do not need to do anything special to prepare for the sample collection. Fasting is not required for this test.

Test type:

In person or via trained mobile phlebotomist

Biomarkers

T3 Free Triiodothyronine

Symptoms or conditions analyzed by this test

The Free Triiodothyronine (T3) test measures the active form of T3 hormone to assess thyroid function. Elevated free T3 levels can indicate hyperthyroidism, leading to symptoms such as weight loss, rapid heart rate, and heat intolerance. Low free T3 levels are indicative of hypothyroidism, with symptoms like fatigue, weight gain, and cold intolerance. This test is crucial for diagnosing thyroid conditions and evaluating treatment effectiveness.

Question 1