A finger-prick home blood test that checks your vitamin D level, useful if you spend little time in the sun or have symptoms of a shortage.
1 biomarker as listed by Better2Know.
Vitamin D helps your body absorb calcium and other minerals, and a shortage is linked to weakened bones and a higher risk of infections; you are more likely to be low if you have limited sun exposure, darker skin, or spend most of your time indoors or covered up.
Within the vitamin D comparison group we track, this home kit's £55 sits a little above the £49 median, about 12% higher. The peers we compare it with span a wide range, from MyHealthChecked's £8 rapid test up to Forth's £50 home kit, so this kit is towards the pricier end of that range without being dramatically out of line. Better2Know also sells a clinic version of the same single marker for £135, so the home kit is by far the cheaper of its own two options.
The scores here are strong across the board: high marks for clinical depth, because it delivers exactly the single marker it promises, for collection convenience, since you can test entirely at home with results in a day or two, and for clarity, given the sample type, collection route and turnaround are all clearly stated. value for money is only middling because of that gap to the group median, and results and follow-up scores lower because the result is not reviewed by a doctor as standard.
This suits anyone who wants a fast, at-home check of their vitamin D level without a clinic visit, particularly if you already know you are in a higher-risk group for low vitamin D, such as spending little time outdoors.
If price is the main concern, MyHealthChecked's £8 rapid test covers the same single marker for a fraction of the cost, and several other providers, including Medichecks and YorkTest, price their vitamin D tests in the high £30s to low £40s.
You take a finger-prick blood sample at home using the kit provided and post it back to the lab; Better2Know also offers a venous-draw clinic version of this same marker for £135 if you would rather have blood taken by a professional. The sample is analysed for vitamin D, with results typically available within about a day of the lab receiving it, accessible through Better2Know's online patient area. The provider does not state that results are reviewed by a doctor as standard, though you can discuss them with a Better2Know doctor afterwards if you wish.
Better2Know's Vitamin D Home Test Kit costs £55 for a finger-prick sample you take yourself, close to the £49 median among the vitamin D tests we compare it with. Some peers undercut it substantially, including MyHealthChecked's rapid test at £8, but most sit within a few pounds either side of £55. As with Better2Know's other tests, the result is 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.
Trustpilot 4.2 from 775 reviews; CQC registered; trading 18+ years.
£55.00 against a comparison-group median of £49.00 (+12%).
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 D test comparison group. See how it stacks up against equivalent tests from other providers.
Below-median price, but not the cheapest vitamin D test
Checks your blood level of vitamin D, which is commonly low in people who spend little time outdoors, have darker skin or are over 65. A simple single-marker test suited to anyone wanting a quick, low-cost deficiency check.
Measures both vitamin D2 and D3
A single blood test measuring total vitamin D (D2 and D3 combined), used to check for deficiency or to monitor supplementation.
Priciest vitamin D test in this comparison group
This is a single blood test for vitamin D, a nutrient linked to bone and immune health that is commonly low among people in the UK, particularly in winter. It suits anyone who wants to check their level rather than guess whether they need to supplement.
Vitamin D check priced above Medichecks' own £39 version
This single-marker blood test measures vitamin D, commonly checked to assess deficiency that can affect energy, bone health and mood. Suits anyone wanting a quick vitamin D check, including those with limited sun exposure.
At the group median, far from the cheapest option
A single-marker blood test measuring vitamin D levels, relevant given how common low vitamin D is in the UK, especially over winter.
Priced right at the median for vitamin D tests we track
A single-marker blood test measuring vitamin D (25-OH), for checking levels linked to bone health, immune function and general wellbeing.
Cheapest vitamin D test among eight we compare
A rapid finger-prick test checking whether vitamin D levels are sufficient, insufficient or deficient, with a result in minutes. Suits anyone concerned about low vitamin D who wants a quick, low-cost check.
At-home vitamin D test, close to the group median
An at-home blood test measuring vitamin D levels, relevant for anyone with low sun exposure, a vegan diet, or a dairy allergy who wants to check for deficiency.
Vitamin D check priced below most single-marker rivals
An at-home finger-prick test measuring vitamin D levels. Suited to a quick standalone check for people concerned about deficiency.
Costs far more than any listed peer for the same marker
A clinic blood test that checks your vitamin D level, for anyone who would rather have blood drawn by a professional than use a finger-prick kit.
Most expensive Vitamin D test in our comparison group
A single blood test measuring Vitamin D (25-OH), commonly used to assess whether your level is low, adequate or high. Suited to anyone monitoring bone, muscle or general health.
Vitamin D self-test is a semi-quantitative rapid test for detecting vitamin D in blood, which is considered the most accurate way to understand vitamin D levels.
Below-median price, but not the cheapest vitamin D test
Checks your blood level of vitamin D, which is commonly low in people who spend little time outdoors, have darker skin or are over 65. A simple single-marker test suited to anyone wanting a quick, low-cost deficiency check.
Measures both vitamin D2 and D3
A single blood test measuring total vitamin D (D2 and D3 combined), used to check for deficiency or to monitor supplementation.
Priciest vitamin D test in this comparison group
This is a single blood test for vitamin D, a nutrient linked to bone and immune health that is commonly low among people in the UK, particularly in winter. It suits anyone who wants to check their level rather than guess whether they need to supplement.
Vitamin D check priced above Medichecks' own £39 version
This single-marker blood test measures vitamin D, commonly checked to assess deficiency that can affect energy, bone health and mood. Suits anyone wanting a quick vitamin D check, including those with limited sun exposure.
