T4 (Free) Test at Home in Dubai
Also known as: FT4, FREE T4, FREE THYROXINE
Included
About the Test
Free T4 measures the unbound, biologically active portion of thyroxine that is available to tissues, making it one of the most reliable indicators of thyroid function. It is frequently ordered with TSH to confirm and characterise an underactive or overactive thyroid, and it is generally preferred over Total T4 when pregnancy, contraceptives or illness alter carrier-protein levels. Doctors also use it to fine-tune thyroid hormone replacement and to track how a diagnosed condition is responding.
What is it? Free T4 (FT4, Free Thyroxine) measures the active, unbound fraction of thyroxine hormone circulating in the blood.
- Smart Report
- Home Collection
- DHA Licensed Staff
- Doctor Reviewed
Test Included: 1 Test
T4 (Free)(1 Test)
T4 (Free) test: purpose, preparation and results
Why take the T4 (Free) test?
- Confirm and clarify an abnormal TSH result
- Assess symptoms of thyroid over- or under-activity such as weight change, anxiety or sluggishness
- Monitor thyroid hormone replacement or anti-thyroid treatment
How to prepare for the T4 (Free) test
No fasting is required for a Free T4 test. Inform the nurse about thyroid medication, biotin supplements or pregnancy, and where possible take thyroid tablets after the sample rather than before.
Understanding your T4 (Free) results
A low Free T4 usually reflects an underactive thyroid and a high level an overactive one, and pairing it with TSH tells your doctor whether the cause sits in the thyroid or the pituitary. Interpret any result with a doctor before changing treatment.
How to book the T4 (Free) test in Dubai
- 1Book your slot
Book on the site or WhatsApp — same morning or next day. Fasting reminders included.
- 2Your nurse visits
A DHA-licensed nurse does a ~20-minute draw at your home, office or hotel. Sealed kit.
- 3Lab processes it
Most of our tests are processed at AVM Labs, Dubai, a CAP-accredited laboratory with ISO 15189 accreditation from EIAC (No. LB-MED-227).
- 4Your doctor reads it
A BestDOC doctor reviews the results, then the report lands on email + WhatsApp with notes.
Packages that include this test
Wider panels that cover T4 (Free) — or browse all 42 packages.
Frequently Asked Questions
Anything else? Ask on WhatsApp — we usually reply in three minutes.
Free T4 is reported in about 8 hours, so a morning draw is usually available the same day. You receive a doctor-reviewed report on WhatsApp and email after the lab completes it.
No, fasting is not required for Free T4. You can eat normally beforehand unless you have also booked a fasting panel such as lipids or glucose, in which case follow that panel's fasting rule.
Free T4 reflects only the active hormone that tissues can use, so it stays reliable even when pregnancy, contraceptives or illness change the binding proteins that skew Total T4. Many doctors treat it as the more accurate marker.
Where possible, collect the sample before your morning dose or take the tablet afterwards, as timing can affect readings. Follow your doctor's specific instruction and never skip medication without advice.
It can point to early, pituitary-related or medication-influenced thyroid changes, and needs a doctor's interpretation alongside your symptoms. A single value is rarely enough to diagnose or change treatment on its own.
A DHA-licensed nurse draws your blood at home, office or hotel in Dubai in roughly 20 minutes. Billing is self-pay in AED, with no insurance forms to complete.