It is known as the silent assassin, but about 10,000 people in Cumbria do not know they are living with type 2 diabetes.
A nationwide campaign is underway to raise awareness of its potential dangers and how to prevent it.
Watch the full report from Katie Hunter below.
A charity's spending £2 million highlighting the dangers of type two diabetes.
Gordon Richens from Carlisle is one of almost three million people the UK with the condition.
He was diagnosed seven years ago and is urging others who think they have the condition to see their doctor:
A £2 million campaign to raise awareness of type two diabetes gets underway this afternoon.
Less than a third of people in the UK realise the condition can lead to amputations, heart attacks, blindness and stroke, according to a new survey.
Unlike type one diabetes, eighty per cent of type two diabetes can be prevented by making lifestyle changes.
Chief Executive of Diabetes UK, Barbara Young, said:
“By doing relatively simple things like losing some weight, eating more fruits and vegetable and becoming more active, we can all significantly reduce our risk.”
More than 10,000 people in Cumbria are currently living with undiagnosed diabetes.