I did the risk calculator on diabetes site too and my only risk factor was my age, similar to jane. I am not overweight, have a healthy diet and exercise moderately, so I was shocked to find out after a routine blood test a few months ago that I was in fact pre diabetic. I decided to try changing my diet, reducing carbs, with the help of the low carb support thread on here. 9 months on I have lost a stone, eat few carbs, have not missed them and am never hungry. This way of eating is permanent for me now and hopefully will prevent me from developing type II diabetes in the future. I am due a blood test shortly so fingers crossed.