A 3-marker blood test combining ferritin, vitamin B12 and vitamin D, aimed at people at higher risk of these common deficiencies, such as those on plant-based diets or with limited sun exposure.
3 biomarkers as listed by Selph.
The Iron, Vitamin D & B12 Deficiency Blood Test measures ferritin, active vitamin B12 and vitamin D, three of the most common nutrient deficiencies in the UK. Testing them together suits people at higher risk of more than one, such as those on plant-based diets, who are more likely to be low in iron and B12, or anyone with limited sun exposure, which affects vitamin D.
Its 3 markers place it in the 69th percentile among the vitamin tests we track, and at £79 it costs about 7% less than the £85 median for similarly sized vitamin panels. There is no direct comparison group of equivalent 3-marker combination tests in our data to benchmark it against more precisely.
It scores well across Clinical Depth, Collection Convenience and Trust Signals, the latter two reflecting the choice of collection method and doctor review of every result within 1 to 2 days.
This suits you if you want ferritin, B12 and vitamin D checked together rather than ordering three separate tests, for example if you are on a plant-based diet or spend most of your time indoors. If you only need one of these three markers, Selph's single-marker Iron Deficiency Blood Test (£49) would cost less.
You can collect a sample at home with a finger-prick kit included in the price, or pay more for the Tasso EasyDraw device, a clinic visit or a nurse draw at home or work; a self-arranged venous draw is also included. A Selph doctor reviews your results and provides a written report, typically within 1 to 2 days.
This 3-marker test combines ferritin, vitamin B12 and vitamin D for £79, about 7% below the £85 median for the 92 similarly sized vitamin tests we track. It bundles three of the most commonly deficient nutrients in the UK into a single order rather than testing them separately. There is no named comparison group of directly equivalent 3-in-1 panels in our data to weigh it against more precisely.
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.
3 biomarkers, placing it in the 69th percentile of vitamins 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 2 days, in line with or faster than similar tests.
Results are reviewed by a doctor; the provider does not describe the report format.
Trustpilot 4.9 from 71,592 reviews; accredited lab (UKAS ISO 15189 partner labs (Inuvi, TDL)); CQC registered; doctor review as standard.
£79.00 against a median of £85.00 for the 92 similarly sized vitamins tests we track (-7%).
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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