A single blood test measuring Free T3, the active form of thyroid hormone. It suits people already being monitored for a thyroid condition with a less conventional treatment plan, rather than as a first thyroid check.
1 biomarker as listed by Blue Horizon Medicals.
Free T3 is the active form of thyroid hormone in the body, doing the work at a cellular level, though according to the provider it is not always needed for routine monitoring of thyroid treatment and tends to be requested when a treatment approach is less conventional. On its own, a Free T3 result gives you one part of the thyroid picture rather than the fuller view you would get by testing alongside TSH and Free T4.
Blue Horizon Medicals does not list group peers for this specific single-marker Free T3 test, but against the 16 similarly sized thyroid tests we track more broadly, it sits toward the lower end for depth, since a single marker naturally scores lower than multi-marker thyroid panels, and its price of £54.25 is about 15% above the £47.13 median for that wider set. Collection is flexible, with finger-prick at home, the Tasso autodraw device, a clinic visit or a nurse home visit all available, and results back within one working day.
The listing gives a short but clear description of what Free T3 measures, backed by stated collection options and a clear turnaround, which supports a solid clarity score. Trust signals reflect Blue Horizon Medicals' Trustpilot score of 4.2 from 395 reviews, UKAS ISO 15189 partner labs, and a trading history back to 2009. Results are reviewed by a doctor, though you need to opt in and pay extra for doctor commentary at checkout.
This suits you if you are already being monitored for a thyroid condition and your treatment approach means Free T3 specifically has been recommended, rather than as a general first thyroid check. On its own it will not give you the fuller picture that TSH and Free T4 together provide, so most people investigating thyroid symptoms for the first time are better served by a combined thyroid panel.
If you are unsure which thyroid markers you need, speak to your GP or the specialist managing your treatment before ordering a single-marker test like this one.
You can provide a sample by finger-prick at home, using the Tasso autodraw device, by venous draw at a clinic, or through a nurse home visit, selecting your preferred option at checkout. Once the sample reaches the lab, Free T3 is measured and the results are reviewed by a doctor, with a turnaround of one working day.
This is a single-marker test for Free T3, the active form of thyroid hormone that does the work at the cellular level. At £54.25 it costs more than the £47.13 median for the 16 similarly sized thyroid tests we track, a premium of around 15%. Because it only measures one marker, it works best alongside other thyroid markers such as TSH and Free T4 rather than as a stand-alone thyroid check.
The listing publishes a short description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.
1 biomarkers, placing it in the 10th percentile of thyroid tests we track.
A finger-prick sample you take at home; with a venous or clinic option as well; a home nurse visit is offered; results in around 1 days, well ahead of the thyroid norm of 2.
Results are reviewed by a doctor; the provider does not describe the report format.
Trustpilot 4.2 from 395 reviews; accredited lab (UKAS ISO 15189 partner labs); trading 17+ years.
£54.25 against a median of £47.13 for the 16 similarly sized thyroid tests we track (+15%).
Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.
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