Measures Thyroid Stimulating Hormone to check for an underactive or overactive thyroid.
Also known as: TSH Test, Thyroid Stimulating Hormone Test, Serum TSH Test, Ultra-Sensitive TSH Test, Thyroid Function Test
The TSH Ultra-Sensitive Test measures the level of Thyroid Stimulating Hormone (TSH) in your blood. TSH is produced by the pituitary gland and plays an important role in regulating the production of thyroid hormones (T3 and T4), which control your body's metabolism, energy levels, heart rate, body temperature, and many other essential functions.
An imbalance in TSH levels may indicate thyroid disorders such as hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid). Detecting thyroid problems early can help prevent long-term complications and support timely treatment.
With OnHealth, you can book your TSH Ultra-Sensitive Test online and enjoy convenient home sample collection by trained phlebotomists from certified laboratories.
The TSH Ultra-Sensitive Test is one of the most accurate blood tests used to assess thyroid function. It measures very small changes in TSH levels, making it useful for diagnosing thyroid disorders at an early stage.
When thyroid hormone levels (T3 and T4) decrease, the pituitary gland releases more TSH to stimulate the thyroid gland. Conversely, when thyroid hormone levels become too high, TSH production decreases. This balance helps maintain normal body functions. Any disruption may lead to symptoms affecting metabolism, weight, mood, heart health, fertility, and overall well-being.
Understanding your TSH test results
Your TSH report will show your hormone level along with the laboratory's reference range. Generally:
In some situations, your doctor may recommend additional thyroid tests such as Free T3, Free T4, Total T3, Total T4, thyroid antibody tests, or a complete thyroid profile. Always discuss your results with a qualified healthcare professional for proper diagnosis and treatment.
Free home sample collection
Your doctor may recommend a TSH test if you have symptoms suggesting thyroid dysfunction, a family history of thyroid disorders, or as part of a routine health checkup or to monitor thyroid medication.
Symptoms of hypothyroidism (low thyroid function):
1.TSH (Ultrasensitive)
Measures Thyroid Stimulating Hormone to assess thyroid function and detect hypothyroidism or hyperthyroidism.
| Parameter | Normal range |
|---|---|
| TSH (Ultrasensitive) | 0.4–4.0 mIU/L (varies slightly between laboratories) |
Reference ranges can differ between labs. Your report shows the range used by the lab.
A TSH Ultra-Sensitive Test is a blood test that measures the level of Thyroid Stimulating Hormone (TSH) in your blood. It helps assess thyroid function and detect conditions such as hypothyroidism and hyperthyroidism.
The test is used to diagnose thyroid disorders, monitor thyroid treatment, investigate symptoms of thyroid imbalance, and evaluate overall thyroid health.
No. Fasting is not required for a TSH Ultra-Sensitive Test. You can eat and drink normally unless your doctor advises otherwise.
The normal reference range varies slightly between laboratories, but it is generally around 0.4 to 4.0 mIU/L. Your doctor will interpret your results based on your age, symptoms, and medical history.
| Test name | TSH Ultra-Sensitive Test |
|---|---|
| Location | Sagar |
| Sample type | Blood |
| Number of parameters | 1 |
| Home sample collection | Available |
| Fasting | Not required |
| Report time | Within 24–48 hours |
| Recommended age | 5–99 years |
| Suitable for | Male & Female |
Symptoms of hyperthyroidism (overactive thyroid):
High TSH levels may suggest hypothyroidism (underactive thyroid), where the thyroid gland does not produce enough thyroid hormones.
Low TSH levels may indicate hyperthyroidism (overactive thyroid), where the thyroid gland produces excessive thyroid hormones.
Your doctor may recommend a TSH test if you experience fatigue, unexplained weight changes, hair loss, irregular menstrual cycles, mood changes, rapid heartbeat, or if you have a family history of thyroid disorders.
If you are taking thyroid medication, consult your doctor regarding the timing of your medicine before the test.
A trained phlebotomist collects a small blood sample from a vein in your arm. The procedure usually takes only a few minutes.
Yes. OnHealth offers convenient home sample collection by trained phlebotomists from certified partner laboratories.
Reports are generally available within 24–48 hours, depending on the laboratory.
Yes. Pregnancy can influence thyroid hormone levels. Your doctor may recommend trimester-specific reference ranges when interpreting the results.
Depending on your results, your doctor may recommend Free T3, Free T4, Total T3, Total T4, a Thyroid Profile, or an Anti-TPO Antibody Test.
Yes. Certain medicines, including thyroid medications, steroids, lithium, amiodarone, and biotin supplements, may influence the results. Inform your healthcare provider about all medicines and supplements you are taking.
Your doctor will recommend the testing frequency based on your medical condition. People with thyroid disorders often require periodic monitoring, while healthy adults may include it as part of routine preventive health checkups.
Only a small needle is used to collect the blood sample. Most people experience minimal discomfort.
Yes. Most thyroid disorders can be effectively managed with medication, lifestyle changes, and regular monitoring under medical supervision.
OnHealth offers certified laboratory partners, home sample collection, affordable pricing, secure digital reports, and convenient online booking for a seamless diagnostic experience.
