Date Time Commemorative stamp marks 100th anniversary of University of Toronto’s discovery of insulin Canada Post unveiled the new stamp at an online symposium sponsored by Diabetes Action Canada, U of T’s Banting & Best Diabetes Centre and the department of medicine in the Temerty Faculty of Medicine Among the treasures in the University of Toronto’s archives are letters from grateful diabetic patients and their families addressed to Frederick Banting, who, along with Charles Best, J. J. R. Macleod and James Collip, discovered the role of insulin in the disease. So, it’s fitting that this year’s celebrations marking the 100th anniversary of the medical breakthrough at U of T include a new Canada Post stamp.