Understanding Your Thyroid Test Report (T3, T4 & TSH)
Your thyroid is a small gland in your neck that controls metabolism, energy and weight. A Thyroid Profile blood test checks how well it's working.
The three main numbers
- TSH (Thyroid Stimulating Hormone) — the "control signal" from your brain. High TSH often suggests an underactive thyroid (hypothyroidism); low TSH suggests an overactive one (hyperthyroidism).
- T4 (Thyroxine) — the main hormone the thyroid produces.
- T3 (Triiodothyronine) — the active form your body uses.
When should you get tested?
Common reasons include unexplained weight change, fatigue, hair loss, feeling cold, irregular periods, or a family history of thyroid disease.
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Reading your report
Each lab prints a reference range next to your value. Being slightly outside the range doesn't always mean disease — your doctor considers symptoms and may repeat the test. Never start or stop thyroid medicine on your own.
Educational information only — not a diagnosis.
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Frequently asked questions
What is included in a thyroid profile?
A standard Thyroid Profile measures T3, T4 and TSH. Some labs also offer Free T3/Free T4 and anti-TPO antibodies.
Is fasting needed for a thyroid test?
Fasting is generally not required, but follow any instruction from your doctor or lab, especially if other tests are combined.
Where can I get a thyroid test in Bareilly?
Compare thyroid profile prices across NABL-accredited labs on Smart Bharat Lab and book home sample collection in Bareilly.
Further reading
Public-health pages on this subject. Not written by Smart Bharat Lab.
Medically reviewed by Rahul Massey, BSc MLT (Medical Laboratory Technology)
Last reviewed on 11 October 2026
Checked for accuracy on what each test measures, how the sample is taken and handled, and how to prepare for it. This is not clinical advice: what your result means, and whether you need a test at all, are questions for your doctor.
Please read this
This article is for general awareness and is not medical advice, a diagnosis or a treatment recommendation. Lab results need to be read alongside your symptoms and history, so discuss yours with a qualified doctor before acting on anything here.