Better2Know Heart & cholesterol

INR Test

A blood test measuring how quickly your blood clots (INR/PT), commonly used to monitor anticoagulant medication such as warfarin or to check for clotting abnormalities.

Sample
Blood
Collection
Venous draw at clinic or nurse visit
Results in
1 day
Biomarkers
1
Tests for
  • INR Levels

Test specifications

Provider
Better2Know
Sample type
blood
Collection method
venous draw at clinic or nurse visit
Turnaround time
1 day
Biomarkers tested
1
At-home test
No
Doctor reviewed
No
Gender focus
Both

What's tested

1 biomarker as listed by Better2Know.

  • INR Levels

About this test

The INR (International Normalised Ratio), also called PT (Prothrombin Time), measures how long it takes your blood to clot. It's commonly used to monitor people on anticoagulant medication such as warfarin, and can also help identify clotting or bleeding abnormalities linked to conditions such as liver disease.

There's no curated group of directly comparable INR tests in our data, so we can't name specific competitors, but our formula places its £145 price 16% above the typical similarly sized heart health test, at £125.

Clarity scores well thanks to a full description of the process. Clinical depth and value for money both sit around the middle given the single-marker scope and the price premium noted above, and results and follow-up scores only moderately because there's no doctor review as standard.

Who is it for?

This suits someone already on anticoagulant medication who needs a routine INR check, or someone with a history of unexplained bruising or bleeding who wants this specific marker tested.

Because there's no named peer comparison in our data, it's worth checking whether your GP or an existing anticoagulation clinic can provide the same check before booking privately.

How it works

A clinician takes a standard venous blood sample, which is analysed to calculate your INR value. Results are typically available within one working day. The fact sheet does not state that a doctor reviews the result before you see it, so discuss any abnormal reading with your own doctor.

Pros & cons

Pros

  • Straightforward single-marker test for a specific clotting indicator.
  • Results typically available within one working day.
  • Fully published process and turnaround.

Cons

  • At £145, priced 16% above the typical similarly sized heart health test in our data.
  • No curated peer group for this specific test, so direct price comparisons aren't available.
  • No doctor review of results as standard, and anticoagulant monitoring is often available elsewhere at lower cost.

Our editorial score

Compare Health Test Score Clotting-time check, priced above typical heart tests
Editorial confidence: 9.0/10

This test measures your INR, or prothrombin time, an indicator of how quickly your blood clots, with results back within a day. At £145 there's no curated peer group for this specific test in our data, though it's priced 16% above the typical similarly sized heart health test, 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 5.7/10

    1 biomarkers, placing it in the 20th percentile of heart health tests we track.

  • Collection convenience 6.0/10

    Requires a venous draw at a clinic; a home nurse visit is offered; results in around 1 days, well ahead of the heart health norm of 3.

  • 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 6.5/10

    Trustpilot 4.2 from 775 reviews; CQC registered; trading 18+ years.

  • Value for money 5.7/10

    £145.00 against a median of £125.00 for the 27 similarly sized heart health tests we track (+16%).

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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