Understanding the Glucose blood test

The Glucose blood test measures the concentration of glucose (sugar) in your blood at the time the sample is taken. Glucose is the body’s primary source of energy, and its levels are tightly regulated by insulin and other hormones.

Abnormal glucose levels can indicate problems with insulin production or insulin sensitivity, which may lead to prediabetes or diabetes. This test provides a snapshot of blood sugar control and is commonly used in routine health screening, metabolic assessment, and diabetes monitoring.

Glucose testing can be performed as a fasting test or a random test, depending on clinical indication and how the test is requested.

When a Glucose blood test is recommended

This test is recommended whenever there is a need to assess current blood sugar levels or investigate symptoms suggestive of glucose imbalance.

Testing may be appropriate if you:

• Have symptoms such as increased thirst or frequent urination
• Feel tired or weak without a clear cause
• Have unexplained weight changes
• Have a family history of diabetes
• Are overweight or have metabolic risk factors
• Are monitoring known diabetes or prediabetes
• Have abnormal results on previous blood tests
• Are undergoing routine health screening

Benefits of the Glucose test

1. Quick assessment of blood sugar levels
   Provides immediate insight into glucose control.
2. Supports early detection of diabetes risk
   Identifies abnormal levels before complications develop.
3. Useful for routine and preventive screening
   Commonly included in general health checks.
4. Helps investigate metabolic symptoms
   Supports evaluation of fatigue and thirst.
5. Can be used to monitor treatment response
   Tracks glucose control over time.
6. Simple and widely available test
   Easy to perform and interpret.
7. No complex preparation required
   Fasting may be requested depending on indication.
8. Provides clinically actionable results
   Guides further testing or lifestyle changes.

How the test is carried out

We offer two convenient UK-wide testing options:

Clinic-based blood testing

• Choose your nearest UK clinic
• A healthcare professional collects a blood sample
• The sample is analysed in a certified laboratory
• Results are issued once testing is complete

Home or hotel blood collection (+£60)

• A qualified phlebotomist visits your home, workplace, or hotel
• Blood is collected at a time convenient for you
• No clinic visit required
• Available nationwide across the UK

Both options provide the same laboratory accuracy and clinical reliability.

Understanding your Glucose test results

Low glucose levels (Hypoglycaemia)

Low glucose levels may occur due to fasting, certain medications, or underlying medical conditions.

Typical UK fasting reference range:

• Below 3.9 mmol/L

Symptoms may include dizziness, sweating, or confusion.

Normal glucose levels

Normal glucose levels indicate effective blood sugar regulation at the time of testing.

Typical UK fasting reference range:

• 3.9 – 5.5 mmol/L

Results should be interpreted in context of fasting status.

High glucose levels (Hyperglycaemia)

Elevated glucose levels may indicate prediabetes or diabetes, especially if confirmed on repeat testing.

Typical UK fasting reference range:

• 5.6 – 6.9 mmol/L (impaired fasting glucose)
• ≥ 7.0 mmol/L (diabetes range)

Further testing such as HbA1c or OGTT may be recommended.