Thyroid Function

A blood test measuring TSH and FT4, the two hormones commonly used to assess thyroid function. Suited to anyone monitoring a known thyroid issue or investigating symptoms such as fatigue with a GP.

Sample
Blood
Collection
Venous draw at local venue
Results in
3–8 days
Biomarkers
2
Doctor reviewed
No
Tests for
  • Free thyroxine (FT4)
  • Thyroid-stimulating hormone (TSH)

Test specifications

Sample type
blood
Collection method
venous draw at local venue
Turnaround time
3–8 days
Biomarkers tested
2
At-home test
No
Doctor reviewed
No
Gender focus
Both

What's tested

2 biomarkers as listed by Bluecrest Wellness.

Advanced Thyroid Profile (with antibodies)

  • Free thyroxine (FT4)
  • Thyroid-stimulating hormone (TSH)

About this test

This test measures thyroid-stimulating hormone (TSH) and free thyroxine (FT4), the two hormones most commonly used to assess whether the thyroid is over or underactive. It does not include free triiodothyronine (FT3), which some other providers add to give a fuller picture.

At £65, this is more expensive than several other 2-marker thyroid tests we compare, including YorkTest (£41), MyHealthChecked (£45) and Thriva (£54.90), and it also costs more than 3-marker panels from Monitor My Health (£32) and Medichecks (£45), which add FT3 for less money. It is cheaper than Better2Know's 2-marker kit (£69) and considerably cheaper than Better2Know's 3-marker version (£199).

The score reflects a clearly presented listing and a lab that is UKAS ISO 15189 accredited and CQC registered, offset by a price that sits above the £54.90 group median for a 2-marker test, an in-person venous draw rather than a home kit, and the absence of a doctor review as standard.

Who is it for?

This suits anyone who wants a straightforward TSH and FT4 check, for example to monitor a known thyroid issue or investigate symptoms like fatigue or weight changes alongside a GP. If you want FT3 included too, Medichecks offers a 3-marker panel for £45 and Monitor My Health for £32, both cheaper than this 2-marker Bluecrest test. If you specifically want TSH and FT4 only, Thriva's version at £54.90 is cheaper than Bluecrest's £65. Symptoms of a thyroid problem should always be discussed with a GP.

How it works

You attend a Bluecrest venue for a venous blood draw; there is no at-home kit for this test. The sample is sent to Bluecrest's own UKAS ISO 15189 accredited laboratory to measure TSH and FT4, with results typically back within 3 to 8 days. Results are not reviewed by a doctor as standard.

Pros & cons

Pros

  • Covers both TSH and FT4, the two core thyroid markers
  • Clearly states both biomarkers, the sample type and turnaround
  • Cheaper than Better2Know's equivalent 2-marker and 3-marker kits
  • Can be added to any Bluecrest health check package

Cons

  • Does not include FT3, unlike some 3-marker panels priced similarly or lower
  • More expensive than YorkTest, MyHealthChecked and Thriva's 2-marker tests
  • No doctor review of your thyroid result as standard
  • No at-home kit option; you need to visit a Bluecrest venue for the draw

Our editorial score

Compare Health Test Score Pricier than most 2-marker thyroid tests, no FT3 included
Editorial confidence: 10.0/10

A thyroid blood test measuring TSH and FT4 only, not FT3, taken via a venous draw for £65. That is more than most of the 2-marker thyroid tests we compare, such as YorkTest (£41) and Thriva (£54.90), though cheaper than Better2Know's equivalent kit (£69), and results are not reviewed by a doctor as standard.

Score breakdown

  • Clarity and documentation 9.0/10

    The listing publishes a detailed description, the full biomarker list, a stated turnaround, clear collection options, the sample type; it does not state what the report looks like.

  • Clinical depth 7.1/10

    2 biomarkers against a median of 2 across the 9 tests in its comparison group.

  • Collection convenience 3.0/10

    Requires a venous draw at a clinic; results in around 8 days, slower than similar tests.

  • Results and follow-up 3.0/10

    Results are not doctor-reviewed and no consultation is included; the provider does not describe the report format.

  • Trust signals 9.5/10

    Trustpilot 4.7 from 6,787 reviews; accredited lab (UKAS ISO 15189 own lab); CQC registered; trading 14+ years.

  • Value for money 5.2/10

    £65.00 against a comparison-group median of £54.90 (+18%).

Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.

Compare with similar tests

This test belongs to our Thyroid function (TSH, FT4, FT3) comparison group. See how it stacks up against equivalent tests from other providers.

View all →

Thyroid Function Blood Test

Three-hormone thyroid panel priced like a two-hormone test

Checks TSH, free thyroxine and free T3, the three core hormones used to assess thyroid function. Suited to people investigating symptoms like fatigue or weight change, or monitoring a known thyroid condition.

  • At-home test
8.7 / 10

Thyroid Blood Test

Full TSH, FT4 and FT3 panel at the group median price

Checks the three core thyroid markers, TSH, free T4 and free T3, used to help assess an underactive or overactive thyroid. Suited to anyone with possible thyroid symptoms who wants more than a single TSH reading.

  • At-home test
8.6 / 10

Baseline thyroid function blood test

Same two markers as rivals, but not the cheapest

A basic thyroid check covering TSH and FT4, the two hormones most commonly used as a first screen for an underactive or overactive thyroid. It suits anyone wanting a quick initial check.

  • At-home test
8.0 / 10