Type 2 diabetes diagnoses among Black and Asian men delayed due to hidden genetic risk

Delayed Diagnoses of Type 2 Diabetes in Black and Asian Men

A hidden genetic variant found in Black and Asian men could cause delays in them being diagnosed with type 2 diabetes, new evidence has indicated.

A genetic variant known as G6PD deficiency was detected in around one in seven Black and one in 63 South Asian men in the UK, according to a recent study.

Previous research has found that men with the genetic disorder are more likely to be diagnosed with type 2 diabetes four years later compared to those without G6PD deficiency.

However, less than one in 50 men with G6PD deficiency have been diagnosed, the results have revealed.

Type 2 diabetes is not triggered by G6PD deficiency, but it makes an HbA1c blood test appear artificially low, which can mislead healthcare professionals and delay a diagnosis of type 2 diabetes.

“Our findings highlight the urgent need for changes to testing practices to tackle health inequalities,” said Lead author Professor Inês Barroso.

Author's summary: Genetic variant delays type 2 diabetes diagnosis.

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Diabetes.co.uk Diabetes.co.uk — 2025-10-13