And the condition is becoming more prevalent in children, teenagers of all ethnicities.
Experts suggest the rising rates of type 2 diabetes is due to the obesity epidemic – a key cause of type 2 diabetes.
Type 2 diabetes can be treated with drugs, and many people can reverse their condition by adopting a healthy lifestyle – a healthy diet and exercise.
What is type 1 diabetes? Who is at risk from it?
Type 1 diabetes is where the cells in the body that typically produce insulin have been destroyed, leaving the body unable to produce the key hormone.
It’s far less common, affecting around 10 per cent of adults who have the disease.
It is treated with daily insulin injections or an insulin pump.
This form of the disease typically occurs in childhood, or before the age of 40 and is not linked to obesity.
One well-known sufferer of Type 1 diabetes is Prime Minister Theresa May. She has recently revealed that she has to inject herself with insulin up to five times a day to manage her condition.
While pregnant women can also suffer from gestinational diabetes, when they produce too much blood sugar while carrying their unborn baby.