Glucose Blood Test
Apr 11, 2026
Glucose Blood Test
A glucose blood test measures the amount of sugar (glucose) in your blood—essential for diagnosing diabetes and prediabetes, monitoring blood sugar control, and identifying hypoglycaemia (low blood sugar), with fasting glucose being a key marker for metabolic health. Combined with HbA1c, glucose testing provides a complete picture of blood sugar control.
At Blood Test London, glucose testing costs from £245 with results in 2-3 days. A doctor always reviews every result.
Understanding Glucose Levels
Fasting Glucose (No Food for 8-12 Hours)
Level (mmol/L) | Interpretation |
|---|---|
Below 4.0 | Low (hypoglycaemia) |
4.0-5.5 | Normal |
5.6-6.9 | Prediabetes (impaired fasting glucose) |
7.0+ | Diabetes range |
Random Glucose (Any Time)
Level (mmol/L) | Interpretation |
|---|---|
Below 7.8 | Normal |
7.8-11.0 | May need further testing |
Above 11.1 | Diabetes range |
Glucose vs HbA1c
Test | Measures | Timeframe |
|---|---|---|
Fasting glucose | Blood sugar RIGHT NOW | Snapshot |
HbA1c | Average over 3 months | Long-term control |
Both together give the complete picture.
Who Should Test?
Overweight or obese
Family history of diabetes
Age 40+
Previous high glucose or prediabetes
Gestational diabetes history
Symptoms (thirst, urination, fatigue)
PCOS
Our Glucose Testing Options
Fasting Glucose Only - £245
Fasting blood glucose
Doctor interpretation
Diabetes Screening Panel - £295
Fasting glucose
HbA1c
Doctor review
Full Metabolic Panel - £395
Glucose, HbA1c
Fasting insulin
Lipids
Liver function
Comprehensive review
Book Your Test
Price: From £245
Results: 2-3 days
Doctor review: A doctor always reviews every result
Fasting: 8-12 hours required for fasting glucose
Book via WhatsApp | Phone: 020 3951 3429
Blood Test London by The Wellness. Glucose testing from £245. A doctor always reviews every result.