HBA1C
Private HbA1c blood test in London for £58, measuring long-term glucose exposure with results expected in around 1–2 business days.
Turnaround time
1-2 business days
Biomarkers count
1
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Overview of the HBA1C
The HBA1C blood test measures glycated Haemoglobin, providing an estimate of average glucose exposure over approximately the previous 8–12 weeks.
The test contains 1 biomarker: HbA1c.
Glucose circulating in blood attaches naturally to Haemoglobin within red blood cells.
The higher the average glucose concentration, the greater the proportion of Haemoglobin that becomes glycated.
Because red blood cells circulate for around 120 days, HbA1c provides a longer-term picture than a single fasting or random Glucose measurement.
HbA1c is widely used for diagnosing and monitoring type 2 diabetes.
In the UK, an HbA1c of 48 mmol/mol or above on appropriate testing is within the diabetic range, while 42–47 mmol/mol indicates a high-risk or prediabetic range.
Diagnosis should follow appropriate clinical criteria, particularly when symptoms are absent.
HbA1c can be misleading when red-cell lifespan is abnormal.
Anaemia, haemoglobin variants, recent blood loss, transfusion, pregnancy and selected kidney conditions can influence interpretation.
The test is also not used alone to diagnose every form of diabetes, particularly where rapid-onset type 1 diabetes is suspected.
What Does the HBA1C Test Check?
This test measures 1 biomarker.
HbA1c
Measures glycated Haemoglobin to estimate average blood glucose exposure during the preceding approximately 8–12 weeks.
Who May Benefit From the HBA1C Test?
HbA1c is useful for diabetes screening and long-term metabolic monitoring.
People with a family history of type 2 diabetes - Genetic risk can increase the likelihood of developing abnormal glucose regulation.
People with overweight or obesity - Excess adiposity is associated with insulin resistance.
People with previous borderline glucose results - HbA1c can provide a longer-term perspective.
People with known type 2 diabetes - Serial testing is central to monitoring glucose control.
People with high blood pressure or cardiovascular risk - Metabolic risk factors commonly cluster together.
Women with a history of gestational diabetes - Future type 2 diabetes risk is increased.
People with polycystic ovary syndrome - Insulin resistance is more common in PCOS.
People seeking routine metabolic screening - Type 2 diabetes can remain asymptomatic for years.
How to Prepare
There is no need to alter food intake immediately before the test.
HbA1c reflects weeks of glucose exposure and cannot be meaningfully improved by fasting for one morning.
Symptoms and Reasons to Consider the HBA1C Test
High glucose can be asymptomatic, particularly during early type 2 diabetes.
Increased thirst - Hyperglycaemia can increase fluid loss.
Frequent urination - High glucose concentrations can increase urinary water loss.
Unexplained fatigue - Abnormal glucose regulation can contribute but is non-specific.
Blurred vision - Changes in glucose can temporarily affect the lens and vision.
Recurrent infections - Persistently elevated glucose can increase susceptibility to some infections.
Slow wound healing - Poor glycaemic control can impair healing.
Unexplained weight loss with marked thirst or urination - This may indicate significant diabetes and requires prompt assessment.
No symptoms but significant metabolic risk factors - Screening can identify abnormal glucose before symptoms appear.
Rapid weight loss, vomiting, abdominal pain, severe thirst, dehydration or marked illness with suspected diabetes can indicate an acute metabolic emergency.
Urgent medical assessment is required rather than waiting for a routine HbA1c result.
How to Book Your HBA1C Test
Booking your HbA1c test is straightforward.
Choose the HBA1C
Select the individual long-term glucose test.
Select your sample collection option
Choose an in-clinic blood draw or professional home or hotel phlebotomy.
Attend your appointment
A trained healthcare professional collects the blood sample.
Laboratory analysis
The laboratory measures glycated Haemoglobin.
Receive your results securely
Your authorised HbA1c result is delivered securely.
When Will I Receive My Results?
The current expected turnaround for HBA1C is approximately 1–2 business days after laboratory receipt.
HbA1c is a routinely processed laboratory test.
Results are issued after analysis, quality-control checks and authorisation.
Occasional specimen or analytical issues can extend the reporting timeframe.
Understanding Your Results
HbA1c is usually reported in mmol/mol in the UK.
A result below 42 mmol/mol is generally below the high-risk threshold.
A result of 42–47 mmol/mol is commonly described as non-diabetic hyperglycaemia or a high-risk/prediabetic range.
A result of 48 mmol/mol or above is within the diagnostic range for diabetes when appropriate diagnostic criteria are met.
A single result should be interpreted carefully when no symptoms are present, and confirmation may be required.
For people with established diabetes, individual treatment targets vary according to age, medication, hypoglycaemia risk and other medical conditions.
Why Book With London Blood Tests?
Private HbA1c testing in London - Access long-term glucose assessment privately.
No fasting required - HbA1c can be measured regardless of the most recent meal.
Shows longer-term glucose exposure - Provides more information than one isolated Glucose measurement.
Useful for diabetes screening - Can identify prediabetic and diabetic-range glucose exposure.
Central to diabetes monitoring - Serial results demonstrate long-term control.
Fast results - Expected turnaround is approximately 1–2 business days.
Clinic and home collection options - Professional phlebotomy can be arranged.
Clear pricing - HBA1C costs £58.
Private HBA1C Blood Test in London
London Blood Tests provides private HbA1c blood testing in London for people requiring diabetes screening or long-term glucose monitoring.
The test costs £58 and measures one biomarker: HbA1c.
Results are expected approximately 1–2 business days after laboratory receipt.