Hidden 'type 1.5' diabetes affects millions of adults. Here's how to spot it | BBC Science Focus Magazine

Understanding Type 1.5 Diabetes

Millions of adults are affected by a lesser-known form of diabetes, often referred to as "type 1.5" or Latent Auto-Immune Diabetes (LADA).

The symptoms of LADA are similar to those of type 1 and type 2 diabetes, making it challenging to diagnose. Despite being recognized as a distinct form of diabetes since 1993, LADA is often misdiagnosed, with

as many as 14 per cent of people diagnosed with type 2 diabetes
potentially having LADA instead.

LADA accounts for 3-12 per cent of all diabetes cases in adults and is characterized by an imbalance of sugar, or glucose, in the blood, similar to type 1 and 2 diabetes.

To identify LADA, it's essential to understand its similarities and differences with type 1 and 2 diabetes, as the core set of symptoms can be identical.

Author's summary: Type 1.5 diabetes affects millions, often misdiagnosed as type 2.

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Science Focus Science Focus — 2025-10-20