Blood tests and diagnostics in Reading
If you are worried about B12 deficiency, iron deficiency, anaemia or symptoms that have not been fully explained, you can book private blood tests and a careful GP-led review with me, Dr Asim Naqvi, to help make sense of your results.
Private blood tests with clinical interpretation
I often see people who have had blood tests but still do not feel they understand what the results mean.
Some have been told their results are “normal” despite ongoing tiredness, brain fog, dizziness, pins and needles, palpitations or weakness. Others have low or borderline results for B12, ferritin, iron, folate, vitamin D or thyroid markers but have not been given a clear explanation.
Blood tests can be very useful, but they are only one part of the picture. A result needs to be interpreted alongside your symptoms, medical history, risk factors, medication, diet and any previous treatment response.
My role is to help you understand what your results show, what they do not prove and what the most sensible next step may be.
Why blood test interpretation matters
A blood test result can sometimes look straightforward. At other times, it can be borderline, incomplete or difficult to interpret.
For example, B12 and folate deficiency anaemia is often diagnosed by considering symptoms and blood test results together, not by looking at one number in isolation. NHS guidance also explains that further tests may be arranged when symptoms and blood results suggest B12 or folate deficiency.
Iron deficiency anaemia is usually assessed using a blood sample and a full blood count, and ferritin may also be tested as a marker of iron stores.
In practice, this means the question is not simply “is this result inside the range?” The better question is, “does this result make sense in the context of your symptoms and wider health?”
That is the difference between testing and proper clinical interpretation.
Symptoms that may lead to testing
Blood tests are most useful when they are chosen to answer a clinical question.
I do not treat a number on a screen. I look at the person in front of me, the pattern of symptoms, the risk factors, the blood results, the possible causes and the response to any previous treatment.
I also look for other contributors, because B12 is not always the whole story.
Fatigue, weakness or low stamina
This may include feeling unusually tired, physically drained, unable to exercise normally or slow to recover from everyday activity.Brain fog, poor memory or reduced concentration
Some people describe slower thinking, poor focus, forgetfulness or feeling mentally unlike themselves.Pins and needles, numbness or nerve-type symptoms
This may include tingling, burning feet, altered sensation, balance problems or nerve pain.Dizziness, light-headedness or palpitations
These symptoms can have many causes, so blood tests may form part of a wider clinical assessment rather than being the whole answer.Mouth symptoms, mood changes or pain
A sore tongue, mouth ulcers, burning mouth, low mood, anxiety, headaches or pain syndromes may sometimes sit alongside deficiency or metabolic issues.Symptoms despite “normal” results or previous treatment
If you have already had blood tests, B12 injections, iron tablets or other treatment but still feel unwell, I can review the pattern and consider whether anything has been missed.
What I may test for
The tests I recommend depend on your symptoms, history and previous results. I do not believe in testing everything without a clear reason.
B12 and folate
This helps confirm whether anaemia is present and whether the red blood cells are small, normal-sized or larger than expected.
Ferritin and iron studies
These help assess iron stores and how iron is being transported or used, especially when iron deficiency, inflammation or mixed causes are possible.
Full blood count and anaemia markers
These are important when anaemia is associated with larger red blood cells, nerve symptoms, mouth symptoms, brain fog or other features that suggest deficiency.
Vitamin D, thyroid and inflammation
These can help identify wider medical contributors that may overlap with fatigue, weakness, low mood, aches or abnormal blood results.
Testing before B12 injections or iron infusions
Blood tests are often useful before starting treatment, especially if symptoms are new, the cause is unclear or previous results are incomplete.
If you are considering B12 injections, I will review your symptoms, B12 results, folate, full blood count, risk factors and possible causes before advising whether injections are appropriate.
If you are considering an iron infusion, I will review your full blood count, ferritin, iron studies, symptoms, medical history and previous response to oral iron before advising whether an infusion may be suitable.
This is important because treatment should be linked to a proper clinical reason. If B12 injections or iron infusions are appropriate, I will explain why. If another issue seems more likely, I will say so clearly.
If your results have been called “normal”
I often see patients who have been reassured by a “normal” result but still feel that something is not right.
Sometimes the result is genuinely reassuring. Sometimes it is low-normal, borderline, incomplete or affected by supplements already taken. Tablets, injections, sprays and patches can affect B12 blood results, so I will ask what you have used and when. Current UK guidance specifically recommends asking about over-the-counter B12 preparations when interpreting B12 tests.
I will not automatically assume that a normal result means something has been missed. I will also not dismiss your symptoms just because one test sits within range.
My approach is to look at the pattern carefully and explain what the results support, what they do not prove and whether further testing, treatment, monitoring or referral may be appropriate.
My approach to blood tests and diagnostics
Your symptom pattern
Your blood results in context
Possible causes of low iron
Your previous treatment response
Cofactors and alternative diagnoses
The safest next step
B12, iron and cofactor testing
At B12 Metabolic Clinic, I often look beyond a single marker. B12, iron, folate, vitamin D, thyroid function, inflammation, autoimmune background and gut absorption issues can overlap. Sometimes one result explains the symptoms clearly. Sometimes there are several smaller pieces to the clinical jigsaw.
B12 deficiency and pernicious anaemia
Iron deficiency and low ferritin
Folate, vitamin D and thyroid function
Inflammation, autoimmune and gut context
What happens when you book a consultation
You tell me what has been happening
I start by listening. I want to understand what has changed, how long your symptoms have been present and how they are affecting your work, family life, exercise, mood and confidence.
I review your background carefully
I look at your medical history, medication, diet, gut symptoms, menstrual history, family history, previous diagnoses and any past investigations.
I assess your risk factors
This may include autoimmune disease, gut problems, medication effects, vegan or restricted diet, nitrous oxide exposure, bariatric surgery, heavy periods or a family history of related conditions.
I interpret your results in context
I review relevant results such as B12, folate, ferritin, iron studies, vitamin D, thyroid markers and other tests where available.
I explain my clinical opinion clearly
I will explain what I think may be going on, what the results support, what they do not prove and whether B12, iron or another issue seems most relevant.
We agree a practical plan
Your plan may include further testing, B12 treatment, iron treatment, monitoring, symptom tracking, lifestyle advice, a GP letter or referral where appropriate.
B12 Metabolic Clinic is not an emergency service
Please seek urgent help through NHS 111, 999 or A&E if you have severe chest pain, sudden shortness of breath, fainting, weakness on one side of the body, new confusion, black stools, heavy bleeding, rapidly worsening symptoms or anything that feels severe, sudden or unsafe to wait.
If you have new or rapidly worsening neurological symptoms, severe weakness, problems walking or symptoms that feel unsafe to wait, please seek urgent medical advice.
Book private blood tests and diagnostics with me
If you are worried about your blood results, symptoms that have not been explained or whether B12, iron, folate, vitamin D, thyroid or related markers may be relevant, you do not need to work it out alone.
I will take time to listen, choose tests carefully and explain your results in a way that helps you understand the most sensible next step.
Frequently asked questions
If you are considering an appointment, you may have questions about blood tests, B12 injections, iron infusions or whether this clinic is right for your symptoms. I have answered some of the most common questions below, but if you are unsure, you are welcome to get in touch before booking.
- What blood tests do you offer?
Tests may include full blood count, B12, folate, ferritin, iron studies, vitamin D, thyroid function, inflammatory markers, liver and kidney function and tests related to pernicious anaemia where appropriate.
- Do I need blood tests before B12 injections?
In many cases, blood tests are helpful before starting B12 injections, especially if symptoms are new or the cause is unclear. I will advise what is appropriate after reviewing your symptoms and risk factors.
- Do I need blood tests before an iron infusion?
Yes, blood tests are usually needed before considering an iron infusion. I would normally review full blood count, ferritin and iron studies, along with your medical history and previous response to oral iron.
- What if my blood tests are normal but I still feel unwell?
A normal result may be reassuring, but it does not always explain the whole picture. I will consider your symptoms, risk factors, other markers and previous treatment response before advising whether further testing, monitoring or another diagnosis should be considered.
- Can blood tests diagnose everything?
No. Blood tests can be very helpful, but they do not diagnose every condition or explain every symptom. They are one part of a wider clinical assessment that includes your history, examination where appropriate, risk factors and response over time.
- Can you write to my NHS GP?
Yes, where appropriate. If it would help your ongoing care, I can provide a clear letter for your NHS GP or specialist summarising the assessment, results and recommended next steps.
- How is this different from ordering blood tests online?
This is a GP-led assessment, not just a test order. I choose tests based on your symptoms and history, then interpret the results in context. If the results suggest another diagnosis, further treatment or referral, I will explain that clearly.
- Can I book private blood tests in Reading?
Yes. You can book private blood tests and a GP-led review with me at B12 Metabolic Clinic in Reading. I will recommend tests based on your symptoms, history and previous results.
- Can I bring blood test results I already have?
Yes. Please send any recent NHS or private blood test results before your appointment if possible. I can review them alongside your symptoms and advise whether further testing is useful.
- Where is B12 Metabolic Clinic based?
B12 Metabolic Clinic is located at The Forbury Clinic in Reading, Berkshire.
Remote consultations may also be available where clinically appropriate. If blood tests, B12 injections or iron infusions are needed, I will explain what can be arranged safely and practically.