• Vitamin B12 Test (Active) - The National Blood Test Clinic
  • Blood Test for Active Vitamin B12 - The National Blood Test Clinic
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Vitamin B12 Test (Active)

Vitamin B12 Test (Active)

£161.00 GBP
£161.00 GBP
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Active Vitamin B12 (holotranscobalamin) represents the portion of B12 available for the body’s cells to use. This Vitamin B12 Test (Active) provides a more accurate reflection of functional B12 status compared to total B12 levels. Low active B12 may lead to fatigue, neurological symptoms, memory issues, and anaemia.

Why Need a Vitamin B12 (Active) Blood Test?

Testing active B12 gives clearer insight into whether your body has enough usable B12 for essential processes. Early detection helps prevent irreversible nerve damage and supports healthy energy metabolism.

What Gets Assessed?

  • Active Vitamin B12 Levels

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How Our Test Works

  • Book Your Appointment Via The National Blood Test Clinic

    Place Your Order

    Place your order online and receive a test kit delivered to your home. You’ll need to bring this kit with you to your scheduled appointment at one of our partner blood collection clinics.

  • Blood Draw for Health Screening

    Attend Your Appointment

    At your chosen clinic, a trained nurse or phlebotomist will collect your blood sample using the kit you bring. If a sample collection courier is not available at the site, you’ll be asked to take the sealed sample with you and post it using the prepaid packaging provided.

  • Test to Check Vitamin D Deficiency

    Receive Your Results

    Once your results are ready, you’ll receive an email notification to log in and view them securely via your private portal. Please note: venous blood test results are not automatically reviewed by a doctor. We recommend booking a consultation with a qualified clinician to help you interpret and understand your results fully.

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FAQs

What does the Active B12 Test measure?

This test measures the biologically active form of Vitamin B12 (holotranscobalamin), which is the portion available for your cells to use.

Who should consider this test?

It is recommended for individuals with symptoms such as unexplained fatigue, tingling or numbness, memory issues, mood changes, or when a Vitamin B12 deficiency is suspected.

How is this different from a Total B12 Test?

A Total B12 test measures both active and inactive forms, while the Active B12 test specifically shows the usable form, making it a more accurate reflection of your body’s true B12 status.

What are the symptoms of Vitamin B12 deficiency?

Common signs include tiredness, anaemia, mood disturbances, memory problems, numbness, and neurological changes.

Can supplementation improve B12 levels?

Yes. Both oral and injectable B12 supplements are effective in restoring healthy B12 levels when deficiency is detected.