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HbA1c Diabetes Test Service

Quick Overview

Gain an understanding of your average blood glucose over the last 2 to 3 months to help in the management of diabetes or to see if you may be developing Type 2 diabetes.

This test is not suitable if you are pregnant, for diagnosing diabetes in children or if you have certain other health conditions. If this may be the case please consult with your doctor before taking an HbA1c test. For more details read our HbA1c information page.

Please note you can only purchase this test for yourself or for someone in your care (for example for your child or someone else for whom you are the legal guardian or authorised carer). If you would like to give this test to someone else as a gift, please purchase a Gift Card from our shop and we will send it directly to them for you.


Availability: In stock


HbA1c or glycated haemoglobin is the test used to monitor your blood glucose levels over the previous 2 – 3 months.

This is a different test to the blood glucose test that people with diabetes do frequently (often several times a day), usually with a finger prick and small device called a ‘glucometer’.

To use a cricketing analogy, we look at a cricketer’s batting average over the summer to see how they perform overall since looking at the number of runs in a single day does not give you a good indication of that athlete’s overall skill and performance. In the same way, a blood glucose test gives a snapshot of a level at a particular time, and the HbA1c test gives an indication of what has been happening over a longer period.

Some of the glucose in the blood binds to the haemoglobin inside your red blood cells. Therefore, conditions that affect your red blood cells or haemoglobin can affect your HbA1c results. Such conditions include for example anaemia, iron deficiency, vitamin deficiencies or kidney disease (amongst others).

If there is any possibility that you may have a condition affecting your red blood cells or haemoglobin you should consult with your doctor before taking an HbA1c test.

HbA1c tests should not be used for diagnosis of diabetes in the following cases:

  • Children and young people
  • Women who are currently pregnant or have been pregnant in the past 2 months
  • People with suspected type 1 diabetes
  • People with short duration of diabetic symptoms
  • People at high risk of diabetes who are acutely ill
  • People taking drugs that may cause a rapid rise in glucose, such as corticosteroids or antipsychotic drugs (≤ 2 months)
  • People with acute pancreatic damage or who have undergone pancreatic surgery
  • People with kidney failure
  • People with HIV infection