OVERVIEW:
What is the total T3 lab test?
A total T3 lab test is a blood test that measures the level of triiodothyronine (T3) in blood.
Why is a total T3 lab test done?
A total T3 lab test is done in order to:
- Diagnose thyroid disorders,
- Monitor thyroid gland function,
- To evaluate effectiveness of treatment of a thyroid disorder.
What does a total T3 lab test measure?
A total T3 lab test measures the level of T3 in the blood. T3 exits in 2 forms: bound and free. A total T3 lab test measures both. T3 plays an important role in regulating body metabolism.
Are there any risks associated with this test?
There are no known risks associated with this test.
What are the causes behind a high T3 level?
Pregnancy, liver disease, grave’s disease, hyperthyroidism, thyroiditis, and toxic nodular goiter raise T3 level in the blood.
What are the causes behind a low T3 level?
Hypothyroidism, starvation, and long-term illness decrease T3 level in the blood.
What is the role of T3?
T3 helps maintain muscle control, brain function and development, heart, and digestive functions. It also plays a role in the body's metabolic rate and the maintenance of bone health.
Can this test be performed in children?
This test can be performed in children if necessary.
Normal level of T3 in blood is 100-200 ng/dL.
A total T3 lab test is done in order to:
- Diagnose thyroid disorders,
- Monitor thyroid gland function,
- To evaluate effectiveness of treatment of a thyroid disorder.
