Orange Health
Search for tests or checkups
 Tests
 Checkups
Support
    Free T4 (FT4)44340010% off
    trust markerMins HomeCollection
    trust markerHappyCustomers
    trust markerGoogleRating
    trust markerCertifiedLabs

    What is Free T4 (FT4) Test?

    The thyroid, a gland located at the base of the neck, produces the hormones triiodothyronine and thyroxine (T3 and T4, respectively). Thyroid hormones circulate in two forms in blood: free and bound. 1 The Free Thyroxine (FT4) test measures the unbound form of thyroxine.

    Thyroid hormones help regulate the way your body uses energy. They influence essential body functions, such as metabolism, body temperature, weight, heart rate, muscle strength, mood, and, in children, growth.

    Testing free T4 is considered a more accurate indicator of thyroid function than the total T4 test, which measures both free and bound T4. The FT4 test is commonly used alongside other tests to diagnose and monitor thyroid-related conditions.

    If you are someone who lives in Bangalore seeking to assess your thyroid function, scheduling an FT4 test at home can be convenient for health evaluation.

    Free T4 (FT4) Test Parameters

    The FT4 test measures only one parameter: the concentration of free thyroxine (T4) hormone in the bloodstream. 2 Free T4 is the active form of thyroxine that directly enters your tissues where it is needed. In contrast, bound T4 is attached to specific proteins, preventing it from entering your tissues.

    The production of T4 is regulated by a system involving your brain: the hypothalamus (an organ in the brain) sends a signal to the pituitary gland, which then directs the thyroid to make T4. This hormone influences key body functions, such as metabolism, weight regulation, and energy levels.

    Free T4 (FT4) Test Preparation

    Preparing for an FT4 test at home is hassle-free with the following considerations:

    • Prerequisites

    The FT4 test does not require any special preparations such as fasting.

    • Best Time to Get Tested

    An FT4 test can be done at any time of the day.

    • Who Should Get an FT4 Test

    An FT4 test is recommended for individuals showing signs of thyroid dysfunction, such as unexplained weight changes, fatigue, or irregular heart rates. It is also useful for those with a known thyroid condition, pregnant women, or individuals undergoing treatment for thyroid disorders.

    • Cautions Before Taking a Free T4 Test

    Certain medications, such as steroids or birth control pills, can affect T4 levels. It’s important to inform your doctor of any medicines you’re taking before the test. Additionally, severe chronic illnesses, such as liver cirrhosis, may influence test results.

    Why Take the Free T4 (FT4) Test?

    An FT4 test may be included as part of a thyroid panel for a comprehensive thyroid function evaluation. Here are some reasons the test can be helpful:

    • To diagnose thyroid-related conditions such as hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid).

    • To monitor the effectiveness of ongoing treatment for a thyroid disorder.

    • To provide more information about thyroid function if a TSH test shows abnormal results.

    • To investigate symptoms of hyperthyroidism, which may include anxiety, weight loss, rapid heart rate, and increased sensitivity to heat.

    • To explore symptoms of hypothyroidism, such as weight gain, fatigue, cold sensitivity, and dry skin.

    • To assess thyroid function in cases of pituitary gland disorders, which may affect T4 levels

    Free T4 (FT4) Test Results and Interpretation

    The interpretation of Free T4 (FT4) test results is essential for assessing thyroid function and diagnosing thyroid-related conditions. Here is how the test results can be interpreted:

    ParameterBiological ReferenceInterpretation
    Thyroxine (T4), Free0.78-2.19 ng/dLA higher-than-normal T4 level may result from conditions involving an overactive thyroid, such as Graves’ disease, thyroiditis, taking excessive thyroid hormone medication, toxic thyroid nodules or toxic goitre, certain tumours of the testes or ovaries (rare), receiving medical imaging tests with contrast dye that contains iodine (rare, and only in persons with a thyroid issue), or consuming an unusually high amount of iodine-rich foods (very rare). 6 A lower-than-normal T4 level may indicate hypothyroidism (disorders related to an underactive thyroid, e.g., Hashimoto disease), malnutrition or fasting, severe acute illness, or the use of specific medications. 6

    Understanding your FT4 test results is key to identifying and managing thyroid disorders. A result outside the normal range could signal thyroid dysfunction, prompting further evaluation and treatment.

    FAQs on Free T4 (FT4) Test in Bangalore

    The Free T4 test price in Bangalore is ₹400. This includes home sample collection within 60 minutes after booking and your results will be available within 6 hours of sample collection.

    Yes, home sample collection is available for the Free T4 test. After booking, an eMedic will arrive at your location within 60 minutes to collect the sample.

    An FT4 test is used to assess the level of thyroxine in your blood, helping diagnose thyroid disorders like hypothyroidism or hyperthyroidism, and monitoring treatment effectiveness for thyroid-related conditions.

    No, fasting is not required for this test. However, consult your doctor for fasting instructions if you're undergoing other tests alongside this one.

    To book the Free T4 test at home, follow these steps:

    • Search for "FT4 test in Bangalore” or “FT4 test at home" and choose Orange Health Labs from the options.

    • Choose the test, check the prerequisites, enter your location, and schedule a sample collection.

    • A certified eMedic will collect the sample at your preferred time.

    • Your sample will be analysed at our ICMR-approved, NABL-accredited laboratory.

    • Results will be sent to you via email or WhatsApp within 6 hours and can also be accessed via our app.

    Normal Free T4 levels typically range between 0.78-2.19 ng/dL, but the exact reference range may vary. Consult your doctor to interpret your test results.

    Once booked, an eMedic will collect your sample within 60 minutes. You’ll receive the results within 6 hours after sample collection.

    The frequency of testing is based on your doctor's recommendations, depending on your thyroid health and symptoms.

    This test specifically measures Free T4, the active form of the hormone thyroxine.

    No fasting is needed for the Free T4 test, which allows you to take the test at any time.

    Orange Health provides Thyroid tests including the FT4 test in Bangalore, with the convenience of home sample collection. We offer this service across a wide range of areas, including but not limited to Adugodi, Banashankari, Bannerghatta, Basavanagudi, Bellandur, BTM Layout, Chamrajpet, Cottonpet, CV Raman Nagar, Frazer Town, Giri Nagar, Hebbal, Domlur, Electronic City, Hennur, Hosur, HSR Layout, Jakkur, Jalahalli, Jaya Nagar, Kadugodi, Kammanahalli, Kengeri, Koramangala, Mahalakshmi Layout, Madiwala, Magadi Road, Malleshwaram, Marathahalli, Mathikere, Mysore Road, Nagarbhavi, Nandhini Layout, Old Airport Road, Peenya, RT Nagar, Rajaji Nagar, Rajarajeshwari Nagar, Sadashivnagar, Sahakara Nagar, Sanjay Nagar, Sarjapur, Seshadripuram, Shanthi Nagar, Shivaji Nagar, Sri Nagar, Tyagarajnagar, Uttarahalli, Vasanth Nagar, Vidyaranyapura, Vijaya Nagar, Whitefield, Yelahanka, Yeshwantpur.

    The Orange Health Experience

    Choose precision
    Not a pilot, just as precise
    No more painful pricks
    Trust our fully automated and certified labs
    Customers love us

    Choose precision

    On time, every time!

    • 98% on time collections with a 60 minutes promise
    • 99% reports are delivered on time within 6 hours

    Not a pilot, just as precise

    Meet our expert eMedics!

    • Hygienic, well groomed, and professional eMedics
    • With over 100 hours of training

    No more painful pricks

    Experience painless testing!

    • Our eMedics are trained for a single, painless prick.
    • Don’t believe us? We asked our customers and here is what they said - 98% of customers experienced no pain during sample collection!
    • The most organised sample collection box and experience

    Trust our fully automated and certified labs

    For accurate testing

    • Certified labs
    • eQAS partnership with AIIMS and CMC Vellore
    • We have our own fully automated labs in all 4 cities we are available in

    Customers love us

    The highest rated lab!

    • Google rating: 4.9/5 (16000+ reviews)
    • 1 million+ customers tested
    4.9
    Google Rating

    Highest Rated Diagnostic Lab

    Payment & Refund Policy

    • We do not accept cash payments
    • All modes of online payment are accepted
    • Refunds will be credited back to the source of payment within 3 hours of order cancellation.

    References

    1. T4 (thyroxine) Test. Cleveland Clinic. 2022  Available from:  https://my.clevelandclinic.org/health/diagnostics/24235-thyroxine-t4-test
    2. Thyroxine (T4) Test [Internet]. Medlineplus.gov. 2022  Available from:  https://medlineplus.gov/lab-tests/thyroxine-t4-test/
    3. Free T4 - Health Encyclopedia - University of Rochester Medical Center [Internet].  Available from:  https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=167&contentid=free_t4_thyroxine
    4. Endocrine Society. Thyroid and Parathyroid Hormones [Internet].  Available from:  https://www.endocrine.org/patient-engagement/endocrine-library/hormones-and-endocrine-function/thyroid-and-parathyroid-hormones
    5. Free T4 test Information | Mount Sinai - New York [Internet].  Available from:  https://www.mountsinai.org/health-library/tests/free-t4-test