What is a free T4 test?
The free thyroxine test (FT4), often called a free T4 test, measures the quantity of free thyroxine in your blood. T4 circulates within the blood in two forms: free morpheme (FT4) and bound morpheme. Thyroxine (T4) is a hormone secreted by the thyroid and is important for growth and metabolism. The FT4 test helps to diagnose any suspected thyroid disease (hypothyroidism or hyperthyroidism) and check the treatment efficacy in people diagnosed with a thyroid condition. The unbound or free thyroxine hormone FT4 is the active fraction that is readily available for uptake into cells whereas the bound hormone, T4 on the other hand, represents a circulating storage pool that is not immediately available for uptake into cells.

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When is the free T4 test recommended?

It is recommended: To diagnose any of the suspected thyroid diseases (hypothyroidism or hyperthyroidism).To check treatment in patients with thyroid diseases. If a patient has symptoms of a thyroid disease like weight loss, a rapid pulse, and sweating related to hyperthyroidism (i.e., when your thyroid produces too many hormones).

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Why get the T4 Free (FT4) test?

​Free T4 helps in determining thyroid dysfunction in patients with symptoms of hypothyroidism or hyperthyroidism with normal TSH values. Free T4 measurements can be useful to determine appropriate dose increases or decreases in those taking medication for thyroid disorders when TSH is very high or low. FT4 and T3 are usually elevated with low TSH in hyperthyroidism.

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What does it measure?
The free T4 test measures: Free T4 is often measured as the active form which enters the body tissues where it's needed. Free thyroxine (FT4) constitutes only 0.3% of the entire T3 hormone. Hence, the T4 hormone is often measured as free T4 or total T4.Total T4 includes both the bound and, therefore, the free forms circulating within the bloodstream and may be suffering from the quantity of protein available within the blood to bind to them. Therefore, the thyroxine (T4) free test may be a useful indicator of the T4 levels within the blood when binding proteins are increased or decreased. Thyroid hormones are essential for growth and metabolism. If the thyroid produces very high amounts of T3 and T4 hormones, you'll experience symptoms like weight loss, rapid heartbeat, tremors, sweating, anxiety, increased sensitivity to heat, etc., This is known as hyperthyroidism. This test is employed to measure the amount of free thyroxine (FT4) within the blood. The thyroid produces hormones referred to as triiodothyronine (T3) and thyroxine (T4). These hormones help to regulate the speed at which energy is employed in almost every tissue within the body.

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How long will the reports take?
You will get the reports within 6 hours after the collection of the blood sample.

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What is the cost of the free T4 test in Noida?
The cost of the free T4 test in Noida is Rs. 350.

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How often should I get tested for the free T4 test?
The free T4 test is prescribed by your doctor after a complete assessment of your symptoms and conditions.

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What are the normal values of the free T4 test?
0.78 - 2.19 ng/dl.

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What is the type of sample required?
We require a blood sample for this test.

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What time should I get the test done?
The test can be taken at any time during the day. Every 6 months and no particular precautions are required, unless it is recommended by your doctor.

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Is fasting required for a free T4 test?
No, fasting is not required for the T4 test.

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Any other precautions to be taken before getting myself tested for the free T4 test?
There are no specific precautions for this test.

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How can I book the free T4 test in Noida?
Log into www.orangehealth.com and submit your details. Our highly trained, professional, and vaccinated eMedics will be at your doorstep within 60 minutes or at the time booked by you.

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Why should I book the free T4 test with Orange Health Labs in Noida?
Orange Health Labs is the Fastest Diagnostic Lab. With us, you can get tested at home within 60 minutes of placing an order anywhere in Noida. Or our trained, professional and vaccinated eMedics will be at your doorstep at the time selected by you. Your sample is safely transported at the optimal temperature to our NABL accredited and ICMR approved lab. The results will be delivered to you faster too!