Patients with type 2 diabetes treated with insulin could be exposed to a greater risk of health complications including heart attack, stroke, cancer and eye complications a new University study has found.Examining the UK Clinical Practice Research Datalink (CPRD) ? data that characterises about 10% of the UK population ? a team of researchers from the University’s School of Medicine looked at the risk of death for patients taking insulin compared with other treatments designed to lower blood glucose levels in people with type 2 diabetes.