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.
1 biomarker as listed by Better2Know.
Vitamin B12 works alongside folic acid to keep blood and nerve cells healthy, and helps the body process proteins, carbohydrates and fats for energy. A deficiency can cause symptoms such as rashes, mouth sores, memory problems or low mood, and risk is higher if you are vegan, drink heavily, are over 50 or have certain digestive problems. This test measures B12 alone from a finger-prick blood sample you take at home.
Among the eight vitamin B12 tests we compare, this sits in the middle of the range: £55 against a group median of £46, about 20% higher. It is more expensive than Medichecks and London Medical Laboratory, both £39, and Blue Horizon's £45.25 options, but cheaper than Bluecrest Wellness at £65 and considerably cheaper than Better2Know's own clinic-based version of the same test at £170.
The test scores well for clinical depth, since it measures exactly the single marker it sets out to, for clarity, with a detailed listing, and for collection convenience, given the finger-prick home option. It loses marks on value for money relative to the cheapest options in the group, and on results and follow-up, because results are not reviewed by a doctor as standard.
This suits you if you want to check your vitamin B12 level at home without a clinic visit, particularly if you are vegan, drink heavily, are over 50, or have digestive problems that can affect B12 absorption.
If price is the main factor, Medichecks or London Medical Laboratory offer the same single marker for £39, and Blue Horizon for £45.25. There is little reason to choose Better2Know's own clinic-based version at £170 instead, since it tests the same marker for considerably more.
You take a finger-prick blood sample yourself at home using the kit provided, then post it to Better2Know's laboratory. Results are typically available within one day of the sample reaching the laboratory, and you can view them through Better2Know's online patient area. The fact sheet does not state that results are reviewed by a doctor as standard; a consultation with a Better2Know doctor or nutrition specialist, or your own GP, can be arranged if a deficiency is found.
This finger-prick home kit checks vitamin B12, relevant if you're vegan, drink heavily, are over 50 or have digestive issues that raise deficiency risk. At £55 it costs more than cheaper equivalents from Medichecks and London Medical Laboratory at £39, but is far less than Better2Know's own clinic-based version at £170. Results are not reviewed by a doctor as standard.
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; results in around 1 days, well ahead of the vitamins norm of 3.5.
Results are not doctor-reviewed and no consultation is included; the provider does not describe the report format.
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£55.00 against a comparison-group median of £46.00 (+20%).
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.
Flexible collection, price close to the group average
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.
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.
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.
Flexible collection, price close to the group average
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.
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.
