Private GP London: Understanding Your Blood Test Results

You receive your blood test results, open the document, and find a wall of abbreviations, reference ranges, and numbers that mean very little without medical training. If you have ever searched for private GP london blood test results explained, you are not alone. I am Dr Mitesh Parmar MBBS MRCGP, Principal GP and Clinical Director at Clinique Alpa in Palmers Green, and reviewing blood test results with patients is one of the most frequent reasons people book a consultation with me. In this post I will walk you through the most common blood tests, explain what the results actually mean, share real examples from my clinic, and outline when you should seek further investigation. Whether your results come from an NHS blood test, a private screening panel, or a walk in laboratory, this guide will help you understand what the numbers are telling you.

Why Blood Test Results Can Be Confusing

Blood tests generate a report that lists individual markers alongside a reference range. The reference range represents the values found in 95% of the healthy population. A result outside this range is flagged as abnormal, but “abnormal” does not always mean “dangerous.” Equally, a result within the normal range does not always mean everything is fine.

Context matters enormously. A slightly low haemoglobin level might be entirely normal for a woman with heavy periods but concerning in a man of the same age. An elevated liver enzyme could reflect a single night of heavy drinking or an underlying liver condition. Without a GP to interpret the results in the context of your symptoms, medical history, and examination findings, the numbers alone can cause unnecessary alarm or, worse, false reassurance.

This is why I encourage all patients to have their results reviewed properly, either with me at Clinique Alpa or with their own GP. A 15 minute consultation to explain blood test results can save weeks of anxiety and, in some cases, catch a condition that would otherwise be missed.

The Most Common Blood Tests and What They Measure

Full Blood Count (FBC)

The full blood count is the single most commonly requested blood test in the UK. It measures the number and types of cells in your blood, including red blood cells, white blood cells, and platelets. Your report will typically include haemoglobin (Hb), haematocrit, mean cell volume (MCV), white cell count (WCC), and platelet count.

A low haemoglobin suggests anaemia, which has many possible causes including iron deficiency, vitamin B12 deficiency, chronic disease, and blood loss. A raised white cell count may indicate infection or inflammation. An unusually low platelet count could affect clotting and warrants further investigation.

When I review a full blood count, I look at the overall pattern rather than any single number in isolation. For example, a low MCV alongside low haemoglobin points towards iron deficiency anaemia, whereas a high MCV with low haemoglobin suggests B12 or folate deficiency.

Liver Function Tests (LFTs)

Liver function tests measure enzymes and proteins produced by the liver. The key markers include alanine transaminase (ALT), alkaline phosphatase (ALP), gamma glutamyl transferase (GGT), bilirubin, and albumin.

Mildly elevated ALT is common and can result from alcohol consumption, certain medications (including statins and paracetamol), fatty liver disease, or viral infections. Persistently elevated liver enzymes warrant further investigation, usually with an ultrasound scan and additional blood tests for hepatitis and autoimmune conditions.

NICE guidance recommends that all patients with persistently abnormal LFTs should have an assessment for non alcoholic fatty liver disease, which affects approximately 25% of adults in the UK. This is a condition I screen for regularly through my health screening service.

Thyroid Function Tests (TFTs)

Thyroid function tests measure thyroid stimulating hormone (TSH), free thyroxine (free T4), and sometimes free triiodothyronine (free T3). These tests are essential for diagnosing underactive thyroid (hypothyroidism) and overactive thyroid (hyperthyroidism).

A raised TSH with a low free T4 indicates hypothyroidism, which is common and affects approximately 2% of the UK population, with women affected around 5 to 10 times more frequently than men. Symptoms include fatigue, weight gain, cold intolerance, dry skin, and low mood. An underactive thyroid is easily treated with daily levothyroxine, a synthetic thyroid hormone.

A suppressed TSH with elevated free T4 or free T3 suggests hyperthyroidism, which causes symptoms such as weight loss, tremor, palpitations, heat intolerance, and anxiety.

A patient recently attended my clinic with right sided neck discomfort that had been present for around 3 weeks. He described a sharp sensation when yawning or coughing, and his voice had become noticeably deeper. On examination, I found diffuse swelling across the neck. His recent blood tests from another provider showed normal liver function, satisfactory cholesterol levels, and a normal full blood count, but crucially, thyroid function had never been tested.

This is a pattern I see regularly: a patient has blood tests done, the standard panels come back normal, and everyone assumes all is well. But the symptoms pointed clearly towards a possible thyroid disorder. I arranged a full thyroid function panel including free T4, free T3, and thyroid peroxidase (TPO) antibodies, along with a thyroid ultrasound to assess the neck swelling. The TPO antibodies are particularly important because they help identify autoimmune thyroid disease, which is the most common cause of both hypothyroidism and hyperthyroidism in the UK.

Kidney Function Tests (U&Es)

Urea and electrolytes measure how well your kidneys are working. Key markers include creatinine, estimated glomerular filtration rate (eGFR), sodium, potassium, and urea. The eGFR is the most important figure; it estimates how efficiently your kidneys are filtering waste from your blood.

An eGFR above 90 is generally considered normal. Values between 60 and 89 may indicate mild kidney impairment, especially if accompanied by protein or blood in the urine. An eGFR below 60 on 2 occasions at least 3 months apart meets the criteria for chronic kidney disease (CKD), as defined by NICE.

Many patients are surprised to learn they have early stage CKD, which is often asymptomatic. Regular monitoring through blood tests is the only reliable way to detect it early. Risk factors include high blood pressure, diabetes, a family history of kidney disease, and certain medications.

Cholesterol and Lipid Profile

A lipid profile measures total cholesterol, HDL cholesterol (sometimes called “good” cholesterol), LDL cholesterol (“bad” cholesterol), triglycerides, and the total cholesterol to HDL ratio. This ratio is one of the most useful predictors of cardiovascular risk.

NICE recommends using the QRISK3 calculator to assess 10 year cardiovascular risk in adults over 40. A QRISK3 score above 10% is generally the threshold at which a discussion about statin therapy is recommended. Cholesterol numbers alone, without the context of age, blood pressure, smoking status, family history, and other risk factors, do not tell the full story.

I review lipid profiles as part of a wider cardiovascular risk assessment through my test services at Clinique Alpa, ensuring that every patient understands not just their numbers but their overall risk profile.

Blood Glucose and HbA1c

Fasting blood glucose measures the level of sugar in your blood after an overnight fast. HbA1c (glycated haemoglobin) provides an average blood sugar level over the preceding 2 to 3 months. HbA1c is the standard diagnostic test for type 2 diabetes in the UK.

An HbA1c of 42 to 47 mmol/mol indicates pre diabetes, meaning your blood sugar is higher than normal but not yet in the diabetic range. An HbA1c of 48 mmol/mol or above on 2 separate occasions confirms a diagnosis of type 2 diabetes. Pre diabetes is a critical window for intervention: lifestyle changes including diet, exercise, and weight management can prevent or delay progression to diabetes.

Iron Studies and Ferritin

Ferritin is a protein that stores iron. A low ferritin level is the earliest and most sensitive marker of iron deficiency, often falling before haemoglobin drops. Symptoms of iron deficiency include fatigue, breathlessness on exertion, hair loss, brittle nails, and restless legs.

A ferritin level below 30 micrograms per litre is widely considered deficient, although some patients experience symptoms even at levels below 50. Conversely, a very high ferritin can indicate inflammation, infection, liver disease, or, rarely, haemochromatosis (iron overload).

Hormonal Profile Tests

Hormonal blood tests are frequently requested when investigating menstrual irregularities, fertility concerns, menopausal symptoms, or fatigue. Key markers include follicle stimulating hormone (FSH), luteinising hormone (LH), oestradiol, progesterone, and testosterone.

Another patient contacted me about ongoing painful, heavy periods. Her previous pelvic ultrasound had been reported as normal, and bloods from a few months earlier showed normal liver function, thyroid function, renal function, ferritin, full blood count, and glucose. Everything on paper looked fine, yet her symptoms persisted. I arranged a hormonal profile including FSH, LH, and progesterone, timed appropriately within her menstrual cycle to investigate further.

This case highlights an important principle: normal blood tests do not always mean there is nothing to investigate. The correct tests need to be requested at the correct time, and the results must be interpreted alongside the clinical picture. A GP who knows your history and symptoms is far better placed to do this than an automated laboratory report.

How to Read Your Blood Test Report

Most blood test reports follow a standard format. Each marker is listed with your result, the reference range, and a flag indicating whether the result is normal, high, or low. Here is how to approach the report.

First, look at the flagged results. These are the values outside the reference range and the ones your GP will focus on. Second, remember that a single mildly abnormal result is not usually cause for alarm; trends over time matter more than isolated readings. Third, consider whether the test was done under the right conditions. Lipid profiles and glucose should ideally be fasting. Hormonal tests need to be timed within the menstrual cycle. Iron studies can be falsely elevated by recent inflammation or infection.

If your report contains abbreviations you do not recognise, this is entirely normal. Medical laboratory reports are written for clinicians, not patients, and there is no shame in needing them explained. This is exactly what a blood test review consultation is for. You can book a blood test review at Clinique Alpa, and I will go through every result with you in plain language.

The Traffic Light Guide: What Your Results Might Mean

Why a Private GP Blood Test Review Is Worth the Investment

NHS GP appointments are under enormous pressure, and a thorough review of blood test results requires time that a 10 minute NHS appointment often cannot provide. In a private consultation at Clinique Alpa, I allocate 20 to 30 minutes specifically for blood test reviews. This allows me to explain each result, answer your questions, place the findings in the context of your overall health, and arrange any follow up investigations on the spot.

For patients who have had tests done elsewhere, whether through the NHS, an employer health scheme, or a direct to consumer laboratory, I offer an independent review. You bring your results, and I provide a clear, honest interpretation. If further tests are needed, I can arrange them through my test services. If a referral to a specialist is appropriate, I can organise that on the same day.

The 2 cases I described earlier illustrate this point. In both situations, the patients had received blood test results that appeared reassuring, yet their symptoms persisted. A detailed review in my clinic identified the missing tests that were needed to reach a diagnosis. That is the value of a GP who listens, examines, and thinks beyond the numbers on a report.

Common Questions Patients Ask About Blood Tests

Over the years, certain questions come up again and again when I review blood results with patients. Here are some of the most frequent.

Do I Need to Fast Before a Blood Test?

For lipid profiles and fasting glucose tests, yes. You should fast for 10 to 12 hours before the sample is taken, with only water permitted. For most other blood tests, including FBC, thyroid function, kidney function, and HbA1c, fasting is not required. My team will advise you when you book.

How Long Do Blood Test Results Take?

Standard blood tests typically return results within 24 to 72 hours. Some specialist tests, such as hormonal panels or autoimmune markers, may take up to 7 to 10 working days. Urgent samples can often be processed more quickly. I review every result personally before contacting you with the findings.

What If My Results Are Normal but I Still Feel Unwell?

Normal blood test results do not exclude all conditions. Some diagnoses require specific tests that may not have been included in the initial panel. Others require imaging, examination findings, or clinical assessment to reach. If you feel unwell despite normal results, please book a consultation so I can take a full history, examine you, and determine whether further investigation is needed.

How to Book a Blood Test or Results Review at Clinique Alpa

If you need blood tests arranged or existing results explained, I am here to help. You can call my team on 020 8882 8088 or book a blood test review online. I also offer combined appointments where I take blood samples and review previous results in the same consultation, which many patients find efficient and reassuring.

For more information about the range of blood tests available, visit our blood test results consultation page or explore our full GP services.

Frequently Asked Questions

Can a Private GP in London Explain My Blood Test Results?

Yes. At Clinique Alpa, I offer dedicated blood test review consultations where I go through each result with you, explain what the markers mean, and advise on any further action. This applies whether the tests were done through the NHS, a private laboratory, or at my clinic. You can book by calling 020 8882 8088.

What Blood Tests Should I Have Annually?

For most adults over 40, I recommend an annual panel that includes full blood count, liver function, kidney function, thyroid function, lipid profile, HbA1c, and ferritin. For women, I may also include iron studies, vitamin D, and hormonal markers depending on symptoms. For men, PSA testing may be discussed depending on age and risk factors. Visit our health screening page for more details.

How Much Does a Blood Test Review Cost at Clinique Alpa?

A blood test review consultation is charged at the standard GP consultation rate. If blood samples are taken during the visit, laboratory processing fees apply separately. My team can confirm exact costs when you book. Full pricing is available on our website.

Can You Arrange Blood Tests at Home?

Yes. I offer home visit blood tests for patients who are unable to attend the clinic. A phlebotomy fee applies in addition to the laboratory costs. Call 020 8882 8088 to arrange a home visit blood test.

What If My Blood Test Shows Something Serious?

If a result indicates a potentially serious condition, I will contact you promptly to discuss the findings and arrange urgent follow up. This may include further blood tests, imaging, or a referral to a specialist. You will not be left to interpret a worrying result alone. I personally review every blood test result before it is communicated to the patient.