This blood test measures total vitamin B12, the standard marker for checking B12 status. It suits people who want a straightforward single-marker check rather than the added detail of active B12 or related markers.
1 biomarker as listed by Blue Horizon Medicals.
This test measures total vitamin B12 in your blood, the standard marker used to check for possible vitamin B12 deficiency, which is commonly associated with tiredness, poor concentration and, in more marked cases, anaemia or nerve problems. It reports a single total B12 level rather than breaking this down into active and inactive fractions.
Within the group of comparable single-marker B12 tests we track, this one is priced close to the middle, at £45.25 against a median of £46. Medichecks and London Medical Laboratory offer the cheapest equivalent tests at £39 each, while Forth, Better2Know and Bluecrest Wellness charge more for the same single marker. Blue Horizon offers several collection routes for this test, including an at-home finger-prick kit and a Tasso autodraw device, which is unusual among the tests in this group and helped it score a perfect mark for collection convenience.
Documentation is thorough, with a full description, clear collection options and a stated one-day turnaround. The score is held back slightly on value, since the price sits marginally above the cheapest peers rather than undercutting them, and on clinical depth, because a single marker naturally offers less scope than a multi-marker profile, though that reflects the nature of this comparison group rather than a shortcoming specific to Blue Horizon. Trust signals here come from Blue Horizon's Trustpilot score and its UKAS ISO 15189 partner labs, and doctor review costs extra at checkout rather than being bundled in.
This test suits you if you want a quick, low-cost check of your B12 level, for example to monitor levels after starting supplements or if you follow a vegetarian or vegan diet and want reassurance. Its range of collection options, including an at-home finger-prick kit or Tasso autodraw device, make it convenient if you cannot easily attend a clinic.
If price is your main concern, Medichecks and London Medical Laboratory both offer an equivalent single B12 test for £39, a little cheaper than this one. If you would rather avoid a clinic visit altogether, the at-home finger-prick and Tasso autodraw options here mean you do not need to, unlike tests that require a venous draw.
This is a blood test for total vitamin B12. You can collect your sample at home using a finger-prick kit or a Tasso autodraw device, or have a venous blood draw at a clinic or via a nurse home visit if you prefer. Once your sample reaches Blue Horizon's laboratory, results are typically ready within a day. A doctor's review of your results can be added as an opt-in extra at checkout; it is not included as standard.
This is a single-marker vitamin B12 test at £45.25, collectable at home by finger-prick or Tasso autodraw as well as by venous draw or nurse visit. It sits close to the £46 median for comparable B12 tests, cheaper than Forth, Better2Know and Bluecrest's versions but pricier than Medichecks and London Medical Laboratory, both £39. The main caveat is that it checks total B12 only, without the active B12 reading some providers include.
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.
A single-marker test measuring exactly what it sets out to; depth is not the point of this comparison group.
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 vitamins norm of 3.5.
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.
£45.25 against a comparison-group median of £46.00 (-2%).
Calculated 13 September 2026 from the facts we hold about this test and provider, using our published scoring formula. Scores are not hand-edited.
This test belongs to our Vitamin B12 test comparison group. See how it stacks up against equivalent tests from other providers.
Tied for cheapest single B12 test, with fast results
This test measures active vitamin B12 on its own, the form of B12 that is actually available for your body to use. It suits people with possible deficiency symptoms, such as fatigue, low energy or memory problems, or a diet or condition that raises their risk.
Fast at-home B12 test, near the median price for its group
Checks active B12 (holotranscobalamin), the form of vitamin B12 taken up and used by your cells, from an at-home sample. Suited to a quick, flexible check on B12 status, including for vegetarians and vegans, who are more at risk of low B12.
Joint-cheapest B12 test in its comparison group
A single-marker blood test measuring vitamin B12, useful for checking deficiency risk, particularly on a plant-based diet.
Priced above the median for active B12 tests we track
A single-marker blood test measuring active vitamin B12, suited to people at risk of deficiency, including vegetarians and vegans.
At-home B12 test priced right at the group median
An at-home blood test measuring vitamin B12 levels, useful for vegans, vegetarians and anyone with symptoms of low energy or tiredness that could point to a deficiency.
Mid-priced B12 kit, well under Better2Know's clinic price
This at-home finger-prick test checks your vitamin B12 level, a nutrient needed for healthy blood and nerve cells. It suits people who want a quick, independent check for a B12 deficiency without a clinic visit.
Priciest B12 test in a group full of £39-55 options
A single blood test that measures your vitamin B12 level, useful if you want to check for a deficiency affecting energy, mood or nerve health.
Among the priciest B12 tests we compare, bar one
A single blood test measuring Vitamin B12, commonly used to assess levels relevant to nerve function and red blood cell production. Useful for vegans, vegetarians or anyone with absorption concerns.
Why Take the Vitamin B12 Test? Vitamin B12 is a vital nutrient that plays a crucial role in maintaining overall health.
Tied for cheapest single B12 test, with fast results
This test measures active vitamin B12 on its own, the form of B12 that is actually available for your body to use. It suits people with possible deficiency symptoms, such as fatigue, low energy or memory problems, or a diet or condition that raises their risk.
Fast at-home B12 test, near the median price for its group
Checks active B12 (holotranscobalamin), the form of vitamin B12 taken up and used by your cells, from an at-home sample. Suited to a quick, flexible check on B12 status, including for vegetarians and vegans, who are more at risk of low B12.
Joint-cheapest B12 test in its comparison group
A single-marker blood test measuring vitamin B12, useful for checking deficiency risk, particularly on a plant-based diet.
Priced above the median for active B12 tests we track
A single-marker blood test measuring active vitamin B12, suited to people at risk of deficiency, including vegetarians and vegans.
