The Thyroid Function Test (T3, T4, TSH) is one of the most important diagnostic tests for evaluating thyroid gland performance. The thyroid gland plays a crucial role in maintaining metabolism, growth, energy, and overall hormonal balance. Any disturbance in its function can cause fatigue, weight changes, mood disorders, and more serious hormonal issues.
At Khan Lab and Diagnostic Centre, the test is conducted using modern immunoassay analyzers, ensuring high precision and reliability. The lab is well-recognized in Pakistan for its professional staff, accurate results, and affordable rates.
Whether your doctor suspects hypothyroidism, hyperthyroidism, or you simply want to assess your hormone balance, the Thyroid Function Test at Khan Lab is a smart choice for timely diagnosis and treatment planning.
What is a Thyroid Function Test (T3, T4, TSH)?
The Thyroid Function Test (TFT) evaluates how well your thyroid gland is producing and regulating hormones. It measures three primary hormones:
- T3 (Triiodothyronine) – regulates metabolism and energy.
- T4 (Thyroxine) – controls body temperature and heart rate.
- TSH (Thyroid Stimulating Hormone) – produced by the pituitary gland to signal the thyroid to produce T3 and T4.
Doctors recommend this test when they suspect thyroid disorders such as hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid).
Common reasons doctors suggest the test:
- Fatigue or weakness
- Unexplained weight gain/loss
- Irregular menstrual cycles
- Hair loss or dry skin
- Anxiety, depression, or irritability
- Rapid or irregular heartbeat
Why is the Thyroid Function Test Important?
The thyroid gland affects nearly every organ in your body from your brain and heart to your liver and skin. If its hormones become imbalanced, it can cause wide-ranging health issues.
The test is important for:
- Diagnosing thyroid disorders early before symptoms worsen.
- Monitoring ongoing thyroid treatments for correct medication dosage.
- Assessing metabolic health and overall hormonal balance.
- Detecting autoimmune conditions such as Hashimoto’s or Graves’ disease.
Ignoring symptoms of thyroid imbalance can lead to long-term health issues such as infertility, cardiovascular problems, or chronic fatigue.
When Should You Get a Thyroid Function Test?
You should consider a Thyroid Function Test if:
- You have a family history of thyroid disease.
- You experience symptoms like mood swings, hair loss, or unusual tiredness.
- You are pregnant or planning pregnancy (thyroid hormones affect fetal brain development).
- You are already on thyroid medication and need routine monitoring.
- You’re above 35 and going for a regular health checkup.
Early detection can make a huge difference in managing thyroid-related issues effectively.
How to Prepare for a Thyroid Function Test?
Preparing for the test is simple and does not require fasting. However, for the most accurate results, follow these steps:
- No Fasting Required: You can eat or drink normally before the test.
- Avoid Biotin Supplements: Stop taking biotin or multivitamins with biotin 48 hours before the test.
- Medication Information: Inform your doctor or technician if you take thyroid medicine, birth control pills, or steroids.
- Stay Relaxed: Avoid stress and ensure proper hydration before the test.
Khan Lab provides clear pre-test instructions and ensures a smooth experience for every patient.
How is the Thyroid Function Test Performed at Khan Lab?
At Khan Lab and Diagnostic Centre, the Thyroid Function Test is performed with utmost precision and hygiene.
Step-by-step process:
- Blood Sample Collection: A small blood sample is drawn from a vein in your arm by an experienced phlebotomist.
- Analysis: The sample is analyzed using advanced automated immunoassay equipment to measure the T3, T4, and TSH levels.
- Quality Control: The lab follows international quality assurance protocols to maintain result accuracy.
- Report Delivery: Results are usually available within 24 hours, accessible both online and in print.
Every test at Khan Lab is handled by certified technicians, ensuring accurate and reliable results every time.
Thyroid Function Test (T3, T4, TSH) Report & Normal Values
Your test report will include three main hormone values: T3, T4, and TSH.
| Parameter | Normal Range | Unit |
| T3 (Triiodothyronine) | 80 – 200 | ng/dL |
| T4 (Thyroxine) | 5.0 – 12.0 | µg/dL |
| TSH (Thyroid Stimulating Hormone) | 0.4 – 4.0 | mIU/L |
Note: Ranges may slightly differ depending on age, gender, and lab equipment.
Report Meaning:
- High TSH, Low T4/T3: Hypothyroidism (underactive thyroid)
- Low TSH, High T4/T3: Hyperthyroidism (overactive thyroid)
- Normal levels: Normal thyroid function
Only a qualified doctor should interpret the results and prescribe treatment.
Understanding Abnormal Results
Abnormal thyroid hormone levels can be caused by various conditions.
High TSH Levels (Hypothyroidism)
- Hashimoto’s disease (autoimmune)
- Iodine deficiency
- Pituitary dysfunction
- Certain medications (e.g., lithium)
Low TSH Levels (Hyperthyroidism)
- Graves’ disease
- Toxic multinodular goiter
- Thyroid inflammation (thyroiditis)
- Overmedication with thyroid hormones
If your results are abnormal, your doctor may suggest further tests like Thyroid Antibodies Test, Ultrasound, or Radioactive Iodine Uptake Scan.
How to Maintain Healthy Thyroid Function Naturally
Supporting thyroid health naturally can make a big difference alongside medical treatment.
Here are some simple, effective tips:
- Eat iodine-rich foods such as fish, eggs, and iodized salt.
- Include selenium and zinc sources like nuts and seeds in your diet.
- Avoid smoking and excess alcohol.
- Manage stress through yoga, meditation, or walking.
- Get regular checkups every 6-12 months.
A balanced diet, active lifestyle, and regular testing at Khan Lab can help maintain your thyroid in optimal condition.
Thyroid Function Test Cost at Khan Lab and Diagnostic Centre
The Thyroid Function Test (T3, T4, TSH) cost at Khan Lab and Diagnostic Centre is Rs. 2,880.
This price includes all three hormone levels T3, T4, and TSH offering excellent value for a complete thyroid health assessment.
You can easily book your test online through All Lab Tests or visit the nearest Khan Lab branch for a quick and convenient blood sample collection.
Additional Thyroid-Related Tests at Khan Lab
If your doctor recommends further thyroid testing, Khan Lab offers additional diagnostic options to give a clearer picture of your thyroid health.
| Test Name | Known As | Test Price (Rs.) |
| TSH (Thyroid Stimulating Hormone) | TSH, Thyrotropin | 1,000 |
| Thyroid Antibodies Test | – | 5,500 |
| Thyroid Function Test (T3, T4, TSH) | FT3, Triiodothyronine, FT4, Thyrotropin | 2,880 |
These tests are performed under expert supervision with state-of-the-art analyzers for accurate and timely results.
Khan Lab Thyroid Function Test Price in Pakistan
The Khan Lab Thyroid Function Test Price in Pakistan is Rs. 2,880, making it one of the most affordable and trusted thyroid tests available.
Khan Lab maintains consistent pricing across its branches in Karachi, Lahore, Islamabad, and other cities, ensuring that high-quality diagnostic services are accessible to everyone.
With All Lab Tests, you can also compare prices, check lab availability, and book appointments online without any extra charges.
Where to Book Thyroid Function Test in Pakistan
Looking for a “Thyroid Function Test near me”? You can easily compare Thyroid Function Test costs in Pakistan, view the latest Khan Lab test charges 2025, and choose the nearest diagnostic center through All Lab Tests.
The platform allows you to:
- Book tests online within minutes.
- Receive reports digitally.
- Access trusted labs with verified results.
Khan Lab offers reliable testing, trained staff, and a patient-friendly environment for stress-free diagnostic care.
Book Your Thyroid Function Test at Khan Lab Today
Book your Thyroid Function Test (T3, T4, TSH) today at Khan Lab and Diagnostic Centre through All Lab Tests and get precise, timely, and affordable diagnostic results.
Enjoy:
- Easy online booking
- Home sample collection
- Quick 24-hour reporting
- Nationwide service availability
Take control of your thyroid health now early testing leads to better treatment outcomes and a healthier life.
