What is the free t3 (triiodothyronine) test? Why is the test done? Everything around this, that you should know, in this post and of course our doctors are always there to help you. Just fill in your details in the form down below and we will answer all your questions for FREE!
What is a free T3 test?
This is a test that measures free T3 in the blood. T3 is a hormone made by a gland situated in the throat called the thyroid gland. T3 is found in two forms I.e., bound which attaches to proteins and free form which does not get bound to anything. So, the test measuring both free and bound T3 is known as the total T3 test whereas the test measuring free T3 is called the free T3 test.
Also Read: Thyroid test
What are the other names of the test?
Other names include:
- FT3
- Free Triiodothyronine test
What is the function of T3?
T3 and T4 (thyroxine) regulate the body’s functions and control how energy is being used in the body. They control body temperature, body weight, nervous system and muscle strength.
What are the symptoms indicative of the test?
It is done if the following symptoms are present:
- Anxiety
- Fatigue
- Bulging eyes
- Weight loss
- Increased heart rate
- Hand tremors
- Difficult sleep
- Frequent bowel movements
- Intolerant to heat
What is the use of this test?
It is often used to diagnose conditions of the thyroid gland, usually to diagnose hyperthyroidism.
How is the result interpreted?
- If levels are high- hyperthyroidism
- If levels are low- hypothyroidism
Is there any preparation needed before the test?
There is no preparation needed before the test but there are certain medications that can affect the T3 levels, so these must be stopped for a while before the test.
