Approximately 1.7 million Australians suffer from diabetes of whom about a third are undiagnosed. As a result of changes in lifestyle - worsening dietary choices, reduced exercize levels and consequent increased levels of obesity - diabetes is the fastest growing chronic condition in Australia and has been called the "21st century epidemic". In the most common type - Type II diabetes - there are often no symptoms for many years during which time irreparable damage can be occurring to various organs of the body. We recommend all Australians over 40 are screened for diabetes but if you are overweight then you should be tested earlier. Diabetes Australia has more information about diabetes as well as a calculator that you can use to assess your risk and whether you should be tested.