Iron, Vitamin D & B12 Deficiency Blood Test

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.

  • At-home test
  • Doctor reviewed
Sample
Blood
Collection
At-home finger-prick or Tasso EasyDraw or venous draw (clinic, nurse visit or own kit)
Results in
1–2 days
Biomarkers
3
Doctor reviewed
Yes
Tests for
  • Ferritin
  • Active Vitamin B12
  • Vitamin D

Test specifications

Provider
Selph
Sample type
blood
Collection method
at-home finger-prick or Tasso EasyDraw or venous draw (clinic, nurse visit or own kit)
Turnaround time
1–2 days
Biomarkers tested
3
At-home test
Yes
Doctor reviewed
Yes
Gender focus
Both

What's tested

3 biomarkers as listed by Selph.

Iron status

  • Ferritin

Nutrients

  • Active Vitamin B12

Vitamins

  • Vitamin D

About this test

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.

Who is it for?

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.

How it works

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.

Pros & cons

Pros

  • Combines three commonly deficient nutrients (iron, B12, vitamin D) in a single order.
  • About 7% below the £85 median for similarly sized vitamin tests we track.
  • Four collection options, including a nurse visit at home or work.

Cons

  • If you only need one of the three markers, a single-marker Selph test would cost less.
  • No named comparison group of equivalent 3-in-1 panels to benchmark the price against more precisely.

Our editorial score

Compare Health Test Score Three common deficiencies bundled below the market median
Editorial confidence: 10.0/10

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 8.7/10

    3 biomarkers, placing it in the 69th percentile of vitamins tests we track.

  • Collection convenience 10.0/10

    Can be done at home; with a venous or clinic option as well; a home nurse visit is offered; results within 2 days.

  • Results and follow-up 8.5/10

    Results are reviewed by a doctor.

  • Trust signals 10.0/10

    Trustpilot 4.9 from 71,592 reviews; accredited lab (UKAS ISO 15189 partner labs (Inuvi, TDL)); CQC registered; doctor review as standard.

  • Value for money 6.9/10

    £79.00 against a median of £85.00 for the 92 similarly sized vitamins tests we track (-7%).

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