New blood test to identify type 1 diabetes

By Published On: November 8, 2021Last Updated: September 25, 2025
New blood test to identify type 1 diabetes

A simple blood test for people with Type 1 diabetes which may enable some patients to stop taking insulin will be rolled out in Scotland.

Health bosses say Scotland is the first country in the world to introduce this test which launched in hospital diabetes centres on November 1.

Aimed to improve the accuracy of diagnosis of Type 1 diabetes, the routine testing of C-peptide allows doctors to work out how much insulin someone with diabetes is making themselves.

If C-peptide is present in significant amounts, then it may indicate that the person does not have Type 1 diabetes and that it may be possible to stop or reduce insulin treatment.

The roll-out follows a two year pilot study in NHS Lothian led by consultant physician in endocrinology, diabetes and acute medicine at the Western General Hospital, Professor Mark Strachan.

Professor Strachan said: “C-peptide helps diabetes specialists make a more accurate diagnosis of the cause of diabetes, and that means we can get people on the most appropriate treatment. In some instances, C-peptide testing allowed people to stop very long-standing insulin therapy; this can be life-transforming.

“If anyone has any concerns regarding their diabetes or wishes to know more about the new blood test, they should contact their diabetes clinical team who are best placed to provide specific advice and support based on their individual circumstances.”

There are approximately 315,000 people living with diabetes in Scotland. The programme will be offered to people with a diagnosis of Type 1 diabetes of at least three years duration

Public health minister Maree Todd said: “Diabetes is a clinical priority for this government and we want to ensure that everyone living with diabetes in Scotland can access safe, effective and person-centred healthcare, treatment and support.

“Type 1 diabetes is a significant health challenge right across the world. I am proud that Scotland will be the first country to introduce this blood test which has the potential to have a significant positive impact on the lives of those people living with diabetes.”

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