Dannevirke's Roger Ramsden is a type 2 diabetic and he is warning others the choice is theirs whether they avoid the disease or not.
"If people want to carry on drinking soft drinks and eating sweet stuff, they could end up like me," he said.
"This is a serious problem. I like puddings, but know I can't have them now and I've changed what I eat because it's been a wake-up call for me."
Mr Ramsden says he now tucks into fresh fruit salad and has yoghurt on his morning cereal. "I love pavlova but eat fresh fruit salad instead."
Type 2 is the most common form of diabetes. For many people it can be prevented through following a healthy lifestyle.