Price: £105
Turnaround: 12 hours
Appointment: 15 minutes
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Traveling to London? Our Private GP Clinic Can Help with Urgent Medical Needs
If you travel to London, you may wonder how to access medical care while here. It can be unclear, as
April 15, 2025
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A B12 blood test is also known as a folate deficiency blood test, and it is mainly utilized to establish the level of vitamin B12 in your blood-a nutrient so important because it enables nerves, the brain, and the production of red blood cells to be in good health.
The tests below may be helpful in diagnosing different deficiencies of these vitamins, which may subsequently lead to serious health conditions like anemia, fatigue, and neurological problems.
Low levels of vitamin B12 present symptoms of mood changes, muscle weakness, tiredness and fatigue, a problem concentrating, numbness or tingling sensations in the hands and feet.
A deficiency in vitamin B12, if left untreated, may trigger serious complications such as nerve damage and cognitive impairments.
Those who may be at risk of B12 deficiency include:
It is usually due to nutritional deficiency, especially in vegans and vegetarians, since B12 is generally found in animal products. Absorption problems are also another category. In this category, disorders include Crohn’s disease, Coeliac disease, and previous gastric surgery that interfere with the absorption of B12.
Other causes include pernicious anaemia, a condition whereby the body’s autoimmune system cannot absorb B12 appropriately. Also, some drugs taken for diabetes or acid-reducing drugs, interfere with B12 absorption over time.
If you have low B12 levels, please note that your treatment will depend on the cause and severity. However, to give you a general idea, typical treatment options usually include:
Use our online booking engine or book your test by giving us a call.
On the online booking engine select the “appointment type” you need.
You will be seen by one of our friendly phlebotomists or trained clinicians.
Inform the clinic of any medications or supplements you are taking, particularly B12 supplements or multivitamins, as they may affect the test results. Drinking water before the test is usually recommended to make blood drawing easier. Also, notify your healthcare provider of any pre-existing health conditions, as these could influence the results. Wear comfortable clothing, ideally with sleeves that can be easily rolled up to allow easy access to your arm.
One of our healthcare professionals will draw a small blood sample, typically from a vein in your arm. This process takes just a few minutes. You may feel a slight pinch when the needle is inserted, but it’s usually quick and only minimally uncomfortable. Staying calm and relaxed can make the experience easier. If you are nervous about needles, inform the healthcare staff, and they will help ensure you feel more comfortable.
After the blood draw, you will be asked to apply pressure to the site to help prevent bruising, and a small bandage will be placed over the area. Some patients may experience mild bruising, which usually fades within a few days. In most cases, you can resume your daily activities immediately unless your healthcare provider advises otherwise. Results are typically available within a few days, and your healthcare provider will review them, recommending any necessary treatments or dietary adjustments based on your B12 levels.
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No GP appointment requirement for blood tests
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We offer a wide range of private blood tests in London. Same-day appointments are available 5 days a week.
We work with experienced consultants & healthcare professionals who have received positive feedback from our patients, and with whom we have established long-term relationships.
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Please note that Walk-in Clinic is a private medical centre & not an NHS service. Harley Walk-in Clinic Ltd company registration no. 07472804
