HomeLab TestFree Thyroxine (FT4)
Overview
The human body is an ever-growing organism and to grow, it needs energy. The energy is extracted or produced from enzymes that bond with a hormone produced by the thyroid gland called T4.
An excess of anything is always harmful to the human body. Si...
Risk assessment
Thyroiditis, Goitre, Autoimmune disorders
Ranges
Normal range
Alternative unit
0.9 - 2.3 (ng/dL)
12-30 (pmol/L)
There is a possibility of elevated Free T4 levels in pregnant women and women over 60 years of age.
The ranges may differ between the genders, but this is considered the formal range ...
Test result interpretation
It is important to fully consider the results of the TSH test and the T3 test to understand the results of the Free T4 Test. The lab results may vary, as the test process or laboratory may differ. Speak to the result provider to get complete clarity ...
Sample types
The Free T4 test results are based on blood samples collected from the individual.
Test Preparation
The Free T4 test is a blood test that does not require fasting or any specific preparation, but your test provider may ask you to stop taking any dru...
Frequently Asked Questions
Why is a free T4 test done ?
What should your free T4 level be ?
What is a bad T4 level ?
How is the high Free T4 tested ?
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Free Thyroxine (FT4)
Assessing Unbound Thyroid Hormone Levels for Comprehensive Metabolic Health Insight
Offered by other lab partners
Sample Type:
blood
Fasting Required:
No
Description
Thyroxine (sometime called T4) is a hormone produced by the thyroid gland. The term “free thyroxine” means measured thyroxine that is not bound to proteins in the blood. Thyroxine is only one-tenth as potent as triiodothyronine (T3). That being said, thyroxine acts on almost every cell in the body, helping to setting the metabolic tone of cells.
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