Thyroid Profile, Free
The free thyroid profile measures TSH, Free T3, and Free T4 — the active thyroid hormones. This panel provides a comprehensive assessment of thyroid function and is preferred over total hormone levels.
12 hours
Turnaround
Blood
Sample
What the Thyroid Profile, Free test tells you
This panel reports three results from one blood sample: thyroid stimulating hormone (TSH), free thyroxine (FT4) and free tri-iodothyronine (FT3). Together they describe both ends of a feedback loop. The pituitary gland releases TSH to tell the thyroid how much hormone to make; the thyroid responds by releasing T4 and, in smaller amounts, T3; and the rising hormone levels then tell the pituitary to ease off. Because the pituitary is exquisitely sensitive, TSH usually moves in the opposite direction to the thyroid hormones, and often moves first.
The word free is what distinguishes this panel from the total profile. Almost all thyroid hormone in the blood is bound to carrier proteins and is not available to tissues; only the small unbound fraction can enter cells and act, and that is the fraction measured here. Measuring the free hormones removes a common source of confusion, because pregnancy, oestrogen-containing contraceptives, hormone therapy, and some liver and kidney conditions change how much carrier protein is present without changing thyroid function at all. In those situations a total measurement can look abnormal while the free measurement remains entirely representative — which is precisely why the free panel is usually preferred.
What your doctor reads is the pattern rather than any single value. A raised TSH with low free hormones points towards an underactive gland, a suppressed TSH with high free hormones towards an overactive one, and mixed or unexpected combinations raise other possibilities: a pituitary problem, interference in the assay, a recent medication change, or the temporary shifts that accompany serious illness. Antibody testing is often added when the pattern suggests an autoimmune cause.
Comprehensive thyroid function assessment, evaluation of thyroid symptoms (fatigue, weight changes, palpitations), and monitoring thyroid medication dosing.
TSH with both free hormones gives your doctor the pituitary signal and the gland's response from a single sample.
Free measurements stay representative during pregnancy, on oestrogen-containing contraception and in liver disease.
Fatigue, weight change, palpitations, hair loss and cold or heat intolerance are all reasons to look at thyroid function.
The pattern across the three results is what your doctor uses to decide whether a thyroid dose needs adjusting.
Reasons your doctor may request the Thyroid Profile, Free test
Your doctor may order this test for any of the reasons below. Some are routine checks, others follow specific symptoms or an earlier result.
Symptoms of an under- or overactive thyroid
Symptoms suggesting an underactive thyroid, such as fatigue, weight gain, cold intolerance or constipation.
Symptoms suggesting an overactive thyroid, such as palpitations, tremor, heat intolerance, anxiety or weight loss.
An abnormal TSH
An abnormal screening TSH that needs the free hormones to interpret it.
Treatment, pregnancy & thyroid findings
Monitoring of levothyroxine or antithyroid treatment.
Thyroid assessment in pregnancy or before conception, where carrier proteins change but free hormones stay representative.
A goitre, a thyroid nodule, or a family history of thyroid disease.
No fasting window — pick any slot that suits you, online or on WhatsApp.
A DHA-licensed nurse collects your sample at home or in the office — free home collection.
A physician-reviewed, easy-to-read report lands securely by WhatsApp and email.
A panel of free thyroid hormones with TSH.
Thyroid Profile, Free
A panel of free thyroid hormones with TSH.
This panel reports TSH, free T3 and free T4 together to assess thyroid function. See your detailed report for individual values.
This test is reported descriptively rather than on a numeric scale — each finding below explains what your report may say.
This information is for general education only and is not medical advice. Reference ranges can vary by laboratory, age, sex, and individual factors. Always consult your physician or doctor to interpret your results.
What a higher result can point to
- Graves' disease, the commonest cause of an overactive thyroid.
- A toxic nodule or multinodular goitre producing hormone independently of TSH.
- Thyroiditis, where stored hormone leaks from an inflamed gland.
- Excessive or over-replaced thyroid hormone medication.
- Excess iodine intake, including from contrast dye or certain supplements.
- A pituitary problem producing the unusual combination of a raised TSH with raised free hormones.
What a lower result can point to
- Hashimoto's thyroiditis and other autoimmune damage to the gland.
- Insufficient thyroid hormone replacement, or doses taken irregularly.
- Thyroid surgery, radioactive iodine treatment or radiotherapy to the neck.
- Pituitary disease, where a low or inappropriately normal TSH accompanies low free hormones rather than the usual raised TSH.
- Severe non-thyroidal illness, which temporarily lowers free T3 in particular.
- Medicines including amiodarone, lithium and some cancer immunotherapies.
These are possibilities, not diagnoses. A single value outside the reference range is interpreted alongside your symptoms, history and other tests — your doctor decides what it means for you.
What this test cannot tell you
- The pattern can be misleading during and shortly after severe illness, when hormone levels shift without thyroid disease.
- High-dose biotin supplements interfere with several thyroid assays and can produce a convincingly abnormal set of results.
- TSH lags behind change, so results drawn soon after a dose adjustment may not yet reflect the new state.
- Free hormone results are method-dependent, so serial comparisons are most reliable within one laboratory.
Risks of the blood draw
- Mild bruising or brief soreness where the needle went in.
- Occasional lightheadedness, which settles after a few minutes of rest.
- Bleeding or infection at the site, which is rare with sterile single-use equipment.
- 1The panel reports the pituitary signal (TSH) alongside the two biologically active thyroid hormones.
- 2TSH usually moves in the opposite direction to the free hormones.
- 3Free fractions are unaffected by changes in carrier proteins, unlike total measurements.
- 4The combination of results, not one value, is what identifies the problem.
- 5Recent illness, biotin supplements and dose changes all need to be mentioned for correct interpretation.
Frequently Asked Questions
Everything you need to know about the Thyroid Profile, Free test. Can't find what you're looking for?
Talk to our team→TSH is the pituitary's instruction to the thyroid. When hormone output falls, the pituitary raises the volume of that instruction, so TSH climbs. The two moving in opposite directions is the expected pattern in an underactive gland.
It is usually better to take it afterwards. A dose absorbed shortly before the draw raises free T4 for several hours and can make a correct dose look excessive. Take your tablet as soon as the sample is done.
Only the unbound fraction can enter cells and do anything. Pregnancy, some contraceptives and liver disease change how much carrier protein is in the blood, which shifts the total while leaving the free hormone — and the actual thyroid function — unchanged.
That combination is common and is often described as subclinical. Your doctor will usually want the test repeated after an interval, along with thyroid antibodies, before deciding whether anything needs treating, because a single reading can be a passing fluctuation.
The free thyroid profile measures TSH, Free T3, and Free T4 — the active thyroid hormones. This panel provides a comprehensive assessment of thyroid function and is preferred over total hormone levels.
Comprehensive thyroid function assessment, evaluation of thyroid symptoms (fatigue, weight changes, palpitations), and monitoring thyroid medication dosing.
No, fasting is not required for the Free T3, T4 & TSH test, so you can eat and drink normally beforehand.
The Free T3, T4 & TSH test uses a blood sample, collected quickly by our DHA-licensed phlebotomist with minimal discomfort.
Results for the Free T3, T4 & TSH test are typically ready within 12 hours. You will receive a secure digital report, and your Smart Report highlights anything outside the normal range.
The Free T3, T4 & TSH test is AED 270, which includes free home sample collection and a physician-reviewed report. You can also build a custom panel and pay only for the markers you choose.
Yes. A DHA-licensed phlebotomist can collect your sample at home or the office anywhere in Dubai at no extra cost, 7 days a week. See how it works.
It is commonly chosen by adults. If you are not sure it is right for you, our care team is happy to advise.
Add the Free T3, T4 & TSH test to your cart and complete the short booking wizard, choosing home collection or a lab visit. Guest checkout lets you book without creating an account.
Yes. It is processed at our EIAC-accredited laboratory (ISO 15189:2022) under DHA license 0046381 and verified by board-certified pathologists.
Every report includes reference ranges and plain-language notes. If you have questions, our care team can arrange a clinician review — just get in touch.
Absolutely. Add it to a curated health package or bundle it with any of our 160+ biomarkers, often from a single sample in one visit.