Type
Blood Testing
Biomarkers
1
Duration
15 min
Sample
Blood (venous)
What's included
4 deliverables in this treatment
- Venous blood draw (fee billed separately)
- Laboratory analysis of Free T4
- Written results report
- Professional interpretation and follow‑up consultation
Free thyroxine (FT4) is a single‑marker blood test that measures the amount of active thyroid hormone (Free T4) circulating in your bloodstream. It helps assess thyroid function, which can influence metabolism, energy levels, and overall health. This test is ideal for adults who suspect thyroid imbalance or are monitoring known thyroid conditions, and it uses a venous blood sample with a £15 draw fee separate from the £50 test price.
About this treatment
The Free thyroxine (FT4) test quantifies the concentration of Free T4, the biologically active form of thyroid hormone, in a venous blood sample. Free T4 is a key indicator of how well the thyroid gland is producing hormone, and abnormal levels may support the evaluation of hypothyroidism or hyperthyroidism. The test requires a standard blood draw (venous) and does not need fasting. Results are typically returned within the laboratory’s standard turnaround time. The £50 price covers the laboratory analysis of the single marker, while the blood‑taking fee (£15) is billed separately. Included with the test are a professional interpretation of the result, a detailed written report, and a follow‑up consultation to discuss next steps.
Good to know
- Sample
- Blood (venous)
- Markers
- 1 (Free T4)
- Price
- £50 (lab) + £15 draw fee
Who is this for?
Adults evaluating thyroid function
Preparation required
No fasting required
Panel categories
Biomarkers tested
1The unbound, active form of the main thyroid hormone T4. Free T4 directly reflects thyroid gland output and is used alongside TSH to diagnose and monitor thyroid disorders.
About the clinic
Reviews, team and credentials
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Treatment highlights
- Venous blood draw (fee billed separately)
- Laboratory analysis of Free T4
+2 more items in What's included
Price listed under ‘Free thyroxine (FT4)’; does not include blood taking fee (£15).