Thyroid Hormone Testing
Thyroid hormone testing measures the hormones the thyroid produces and the signals controlling it — providing a complete picture of thyroid function.
This service offers comprehensive panels beyond basic screening.
Last medically reviewed: 1 November 2025
The full panel
A complete assessment may include TSH, free T4, free T3, total T3, total T4, anti-TPO, anti-thyroglobulin, and TRAb — each answering a different question about thyroid status.
The specific panel is tailored to your situation — not everyone needs every test.
When comprehensive testing helps
Complex or unclear cases benefit from fuller panels: suspected T3-toxicosis, Graves’ vs nodular disease distinction, autoimmune evaluation, pregnancy planning, or monitoring cancer treatment.
Basic screening (TSH ± free T4) suffices for most routine evaluations.
Preparation
No fasting is required. Biotin supplements can interfere with some assays — mention all supplements before testing. If taking thyroid medication, timing instructions will be provided.
Frequently asked questions
Which tests do I actually need?
For routine screening: TSH ± free T4. For suspected hyperthyroidism: add free T3 and TRAb. For autoimmune evaluation: anti-TPO ± anti-Tg. Your doctor recommends the appropriate panel.
Can tests be done on the same day?
Yes — all thyroid blood tests are typically done from a single blood draw.
How long do results take?
Most results are available within 1–3 working days; some specialized tests may take longer.
References & further reading
This page is based on established medical knowledge and guidelines from authoritative sources. Always consult a qualified clinician for personal medical advice.
Ready to discuss your thyroid health?
Book a specialist consultation — in person or by teleconsultation.