Vitamin B12 test at home in Dubai
The screen measures active B12, the part your cells can actually take up. It can show a shortfall that a standard total B12 result misses.
What the test measures
Vitamin B12 Active. Also called holotranscobalamin, this is the B12 bound to the protein that delivers it into cells, so it reflects the supply your body can use.
Who should test
Most B12 in the blood is bound to a carrier protein that cells cannot take B12 from. A standard total B12 test counts all of it, so a result can look normal while the usable fraction is low. Active B12 measures only the part on its way into cells. That makes it a more direct signal of a real shortfall, and it tends to fall earlier when supply drops.
B12 is needed for healthy nerves, red blood cells and energy. Low levels can cause tiredness, pins and needles, poor concentration and low mood, often slowly enough that people put it down to stress. It is more common with plant-based diets, with age, after stomach surgery, and in people taking metformin or long-term antacids.
- Tiredness or weakness without a clear cause
- Pins and needles or numbness in hands or feet
- Poor concentration or memory
- Vegan or mostly plant-based diet
- Long-term metformin or antacid use
- A previous total B12 result in the low or borderline range
How to prepare
- Follow the fasting instructions for the full screen.
- Tell your consultant about any B12 supplement or injection, and when you last took it, because recent doses raise the result.
Reading your results
If it comes back low
A low active B12 suggests your cells may not be getting enough. The next step is often working out why, since diet, absorption and some medicines all play a part. Your consultant will go through it with you and suggest when to speak to your own doctor.
If it is borderline
Results in a grey zone are common. They are read alongside your diet, symptoms and blood count, which is part of the same screen, rather than on their own.
If it comes back high
High results usually reflect recent supplements. Without supplements, a raised level is less common and is worth discussing.
Reference ranges differ between labs, and a single result is a snapshot. Your consultant reads every value against your history and the rest of the screen, not in isolation.
How the home test works
This test is part of Baseline’s full blood screen: 122 parameters across ten systems from one draw, for AED 850, with results in 48 hours. It is not sold as a single test, because the result means more next to everything else.
- Nurse comes to you. A licensed phlebotomist visits your home or office, 7 days a week, anywhere in the UAE.
- Accredited lab. Samples are processed by a CAP-accredited laboratory (College of American Pathologists), also accredited to ISO 15189, against clinical reference ranges.
- Reviewed with you. Results land in your account in Baseline format, and your consultant walks you through them on video, never a PDF dumped in your inbox.
Ranges are the lab’s own. Your consultant goes through what they mean with you.
Your results arrive in the Baseline app, every marker against the lab’s own range, checked by your consultant before you see them. The values above are an example.
Questions
- What is the difference between active B12 and total B12?
- Total B12 measures all the B12 in your blood, most of which is bound to a protein cells cannot use. Active B12 measures only the portion that is delivered into cells, so it is a closer measure of what your body can actually use.
- My total B12 was normal. Could my active B12 still be low?
- Yes, it can happen. A total result in the low hundreds in particular can hide a low active fraction, which is why the screen measures active B12.
- Who is most likely to be low in B12?
- People on vegan or mostly plant-based diets, older adults, people with gut conditions or past stomach surgery, and people on long-term metformin or antacids.
- Can I book a B12 test on its own?
- No. Active B12 is part of the full 122-parameter screen and comes from the same home draw as every other marker.
Related tests
This page is general information, not a diagnosis. If you feel unwell, or your symptoms are new or getting worse, speak to a doctor.
Find out whether this is appropriate for you
Reading is not a diagnosis. A consultation goes through your history with you and tells you plainly whether a program fits, including when it does not. AED 350, credited in full against your first order.