T3, T4, and TSH — no fasting required — to identify an over- or under-active thyroid.
The thyroid profile test measures T3, T4, and TSH hormone levels to check for over- or under-active thyroid function, commonly ordered for unexplained weight change, fatigue, or hair thinning.
TSH (thyroid-stimulating hormone) is usually the first marker checked — high TSH often indicates an underactive thyroid (hypothyroidism), while low TSH can indicate overactive thyroid (hyperthyroidism). T3 and T4 are the actual thyroid hormones, checked to confirm and characterise the pattern TSH suggests.
Standard adult reference ranges — labs may vary slightly, and your doctor interprets your specific result alongside symptoms.
| Marker | Normal Range | What It Measures |
|---|---|---|
| TSH | 0.4 – 4.0 mIU/L | Pituitary signal controlling thyroid output |
| T3 (Triiodothyronine) | 80 – 200 ng/dL | Active thyroid hormone |
| T4 (Thyroxine) | 5.0 – 12.0 µg/dL | Primary circulating thyroid hormone |
General reference ranges only — pregnancy, age, and certain medications can shift what's considered normal for you specifically.
We don't charge anything for the referral. This is roughly what labs in past referrals have charged.
Screening-level, single marker.
Complete profile, most commonly ordered.
Tell us which panel you need and your pincode.
Someone who's already used a lab nearby.
Which lab they used, cost, and how it went.
Contact the lab directly — we're not involved.
"Had been feeling unusually tired for months and my doctor suggested checking my thyroid. Didn't want to sit in a lab waiting room feeling that exhausted, so I asked a coworker who mentioned she'd had hers checked at home recently. Same lab, same-day booking, results the next evening."
The thyroid regulates metabolism, energy, and much more — this guide covers what each marker in the standard panel means, common symptoms that prompt testing, and how thyroid conditions are typically monitored over time.
TSH (thyroid-stimulating hormone) is produced by the pituitary gland, not the thyroid itself — it acts as the signal telling your thyroid how much hormone to produce. This inverse relationship is key to interpreting results: when thyroid hormone levels are low, the pituitary produces more TSH to try to stimulate the thyroid, so a HIGH TSH usually points to an UNDERACTIVE thyroid (hypothyroidism). Conversely, a LOW TSH usually points to an OVERACTIVE thyroid (hyperthyroidism), since the pituitary reduces its signal when thyroid hormone is already high.
T4 (thyroxine) is the primary hormone the thyroid produces, making up roughly 95% of circulating thyroid hormone. T3 (triiodothyronine) is the more biologically active form, partly produced directly by the thyroid and partly converted from T4 by other organs including the liver and kidneys. Since TSH is the most sensitive early indicator, T3 and T4 are typically checked to confirm and characterise a pattern TSH has already suggested, rather than as a first-line screening test on their own.
Unexplained weight gain or loss, persistent fatigue, hair thinning, feeling unusually cold or hot, mood changes, and irregular menstrual cycles are common reasons doctors order a thyroid panel — though these symptoms overlap significantly with many other conditions, which is exactly why the test is needed to confirm rather than relying on symptoms alone. Both an underactive and overactive thyroid can cause fatigue, for instance, despite being essentially opposite conditions, which is why symptom pattern alone rarely gives a confident diagnosis.
Hypothyroidism (underactive thyroid) commonly causes fatigue, weight gain, feeling cold, and depression-like symptoms — it's more common overall and often develops gradually, sometimes going unnoticed for a long period. Hyperthyroidism (overactive thyroid) commonly causes weight loss despite normal or increased appetite, feeling hot, rapid heartbeat, and anxiety-like symptoms. Both require ongoing monitoring even once treatment begins, since dosage or management often needs periodic adjustment.
Patients already diagnosed with a thyroid condition typically need periodic testing — often every 6-12 weeks initially after starting medication, then less frequently once levels stabilise — to confirm the dosage is correctly calibrated. This is a genuinely iterative process for many patients, since thyroid medication dosing often needs adjustment before finding the right long-term level.
Pregnancy shifts thyroid hormone needs and reference ranges, requiring trimester-specific interpretation rather than standard adult ranges. Certain medications, including biotin supplements (common in hair/skin/nail vitamins) and steroids, can interfere with accurate thyroid test results — mentioning any supplements or medications you're taking to your doctor or the lab is worth doing before testing. Severe illness can also temporarily affect thyroid readings, which is why unusual results during an acute illness are sometimes retested once you've recovered.
Whether you're testing for the first time based on unexplained symptoms, or managing an existing thyroid condition with regular monitoring, the hardest part is often just finding a reliable lab. A referral from a nearby patient who's already navigated this removes most of that uncertainty. Share your pincode, see who's already found their lab, and take it from there.
No, thyroid profile tests don't typically require fasting, making them easy to schedule at any time of day.
High TSH often indicates an underactive thyroid (hypothyroidism) — your doctor will interpret this alongside your T3 and T4 levels.
Often every 6-12 weeks after starting or adjusting medication, then less frequently once levels stabilise — your doctor will advise based on your specific case.
Yes — biotin, common in hair/skin/nail supplements, can interfere with accurate results. Mention any supplements to your lab or doctor before testing.
Hypothyroidism (underactive) commonly causes fatigue and weight gain; hyperthyroidism (overactive) commonly causes weight loss and rapid heartbeat — both need proper testing to confirm.
Yes — pregnancy shifts thyroid hormone needs, requiring trimester-specific reference ranges rather than standard adult ranges.
No, this test can typically be booked directly without a prescription, though your doctor may specifically order it based on your symptoms.
You do. We only make the introduction — whether you go with the referral or choose someone else is entirely up to you.
Whatever home care you need — physiotherapy, a nurse, elder care, a doctor visit — a patient in your own pincode has probably already found it. Tell us what you're looking for, and we'll connect you directly with them.
