Active B12

What the Active B12 blood test checks
The Active B12 blood test measures holotranscobalamin, the biologically available form of vitamin B12. This marker can support assessment of B12 status when symptoms, diet or previous results need follow-up.
This test may be useful for people reviewing vegan or vegetarian intake, supplementation, tiredness, tingling, numbness, memory concerns or anaemia follow-up with a healthcare professional.
Biomarker included

Active vitamin B12

Sample type and turnaround
This is a blood sample test. Most Leicester clinic results are available within 1 to 2 working days, and UK partner clinic results are typically available within 2 to 4 working days. Some tests can take longer depending on laboratory processing.
How to book with Healthyaa
Book online, choose the Leicester clinic or a UK partner clinic, and receive your report securely by email. There is no separate phlebotomy charge at the Leicester clinic. Partner clinics may charge a separate blood draw fee.
Related tests
You may also want to compare Vitamin B12, Vitamin B Profile, or Homocysteine.
Important information
Active B12 results should be interpreted with symptoms, diet, medication and other blood markers. Seek medical advice for neurological symptoms, suspected anaemia or abnormal results.