This test checks free thyroxine (FT4) and TSH, the two markers used to monitor thyroid hormone levels once you are established on levothyroxine. It suits people who already have an underactive thyroid diagnosis and want a quick check between GP reviews.
2 biomarkers as listed by Medichecks.
Free thyroxine (FT4) and TSH are the two blood markers commonly used to check whether a diagnosed underactive thyroid is being managed at the right levothyroxine dose. FT4 reflects the active thyroid hormone in your blood, while TSH shows how hard your pituitary gland is working to keep thyroid hormone in range; together they are the standard combination for dose monitoring rather than initial diagnosis.
This is a compact two-marker test, which is why it scores lower for clinical depth than broader thyroid panels that also check thyroid antibodies or T3. That reflects the purpose of a monitoring product rather than a shortfall. On price it performs well: at £35 it comes in well under the typical cost of the similarly sized thyroid tests we track.
The score also reflects strong collection convenience, since you can do it as an at-home finger-prick or choose an in-clinic or home nurse venous draw, and strong trust signals from the provider's Trustpilot record, lab accreditation and long trading history. Every result comes with a doctor's comment, which feeds into the results and follow-up score.
This suits you if you already have a confirmed underactive thyroid diagnosis and take levothyroxine, and you want a quick, low-cost check on your levels between scheduled GP blood tests. It is not designed to diagnose a new thyroid problem, and the fact sheet does not list thyroid antibodies or T3, so if you have new symptoms or have never been diagnosed, see your GP or choose a broader thyroid panel instead.
We do not have a directly comparable test logged in this group to point to a cheaper or deeper alternative, so check the biomarker list above against what you actually need before you buy.
You can collect your sample with an at-home finger-prick kit, or arrange a venous blood draw at a clinic or through a home nurse visit. Once your sample reaches the lab it is tested for free thyroxine and TSH, and a doctor reviews the results before your report is released, with results typically back in around 3 days.
This £35 test covers free thyroxine and TSH, priced well below the typical cost of similarly sized thyroid tests we track. It is built for ongoing monitoring rather than diagnosis, so it will not suit someone with new or unexplained symptoms. Results are back in around 3 days with a doctor's comment.
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.
2 biomarkers, placing it in the 29th 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 3 days, slower than similar tests.
Results are reviewed by a doctor; the provider does not describe the report format.
Trustpilot 4.5 from 2,477 reviews; accredited lab (UKAS ISO 15189 partner labs); doctor review as standard; trading 25+ years.
£35.00 against a median of £54.58 for the 24 similarly sized thyroid tests we track (-36%).
Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.
Cheapest full 3-hormone thyroid panel
A three-hormone blood test measuring TSH, FT4 and FT3, the standard panel used to check for an underactive or overactive thyroid.
At-home thyroid panel covering antibodies and nutrients
A 10-marker at-home blood test covering thyroid hormones, thyroid antibodies and nutrients linked to thyroid health, for people investigating symptoms or managing a thyroid condition.
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.
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.
