Metabolic & nutritional health

Active Vitamin B12 Home Blood Test Kit

Monitor your active vitamin B12 levels at home with our convenient home blood testing kit. Perfect for at-home blood tests to support healthy nerve function, red blood cell production, and overall energy.

£

70.50

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  • Fast turnaround test results
  • Results shared electronically via secure SMS
  • Easy sample collection
Turnaround time: 1 day
Sample type: Self-collected finger-prick blood sample using a small-volume TDL Tiny collection kit

What do we test for?

Active Vitamin B12 (Holotranscobalamin)

Holotranscobalamin is the biologically active form of vitamin B12. It plays a crucial role in nerve health, DNA synthesis, and red blood cell production. Measuring active B12 helps identify deficiencies early, preventing anaemia and neurological symptoms.

How will this help you?

What is the Active Vitamin B12 Test?

The Active Vitamin B12 Home Blood Test Kit measures holotranscobalamin, the biologically active form of vitamin B12. Adequate B12 is essential for healthy nerve function, DNA synthesis, and red blood cell production.

What’s Included in the Test?

Who Should Consider This Test?

How Is the Sample Collected?

This kit is designed for self-collection. You’ll perform a simple finger-prick using the lancet, fill the TDL Tiny tube with a small blood drop, then seal and post it back. No clinic visit is needed for this at-home blood test.

Why Test Active B12 at Home?

“Convenient, private, and GP-led – get accurate insights into your B12 levels without leaving home.”

Frequently asked questions

How accurate are at-home active B12 blood test kits?

Our at-home blood tests are processed in UK-accredited laboratories using advanced holotranscobalamin assays. This ensures accuracy comparable to clinic-drawn samples, giving you reliable active B12 results.

How long does it take to get results from an at-home B12 test?

Once your sample arrives at the lab, results are typically ready within 2–3 working days. We’ll notify you by email when your online report is available.

How to test active vitamin B12 levels at home with a home blood testing kit?

Our Active Vitamin B12 Home Blood Test Kit uses a simple finger-prick method. You’ll use the included lancet to collect a small drop of blood into the supplied tube, then return it in the pre-paid envelope. Detailed instructions guide you through each step.

What does the active vitamin B12 test kit include?

Your kit includes: - Single-use lancet for a finger-prick sample - Small blood collection tube (TDL Tiny) - Simple step-by-step instructions - Pre-paid return envelope to our lab Everything you need for a convenient at-home sample.

Who should use the active vitamin B12 blood test kit?

The Active Vitamin B12 blood test kit is ideal for vegetarians, vegans, older adults, or anyone experiencing fatigue, tingling, or anaemia symptoms. It helps you monitor your active B12 status and discuss results with your GP.

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How Mayfield's home blood testing works

1
Order Your Home Blood Test Kit Online

Get started by choosing the right at-home blood test kit for your needs — whether it's for cholesterol, thyroid, vitamin levels, or general health screening. Your kit is delivered in discreet, secure packaging.

2
Collect Your Sample at Home

Using our easy-to-follow instructions, collect a small blood sample with the included lancet and tube. No need for a clinic visit — everything you need for accurate testing is in the kit.

3
Send It to Our Accredited Lab

Place your sample in the prepaid return envelope and post it to our certified partner lab. Our labs follow the highest standards to ensure fast, reliable blood analysis.

4
Get Your Results by Text, Fast

You’ll receive a text message with your results as soon as they’re ready — usually within 1–3 days. A full lab report is included, giving you a clear breakdown of your blood test findings. Need help understanding your results? You can book a follow-up consultation with one of our clinicians at any time.

Learn more

Why Mayfield Clinic for home testing

Why Choose Mayfield Clinic?

What our patients think

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