If you have a family history of diabetes and also suffer from some of the risk factors mentioned above, then it is always advisable to screen yourself regularly to detect diabetes and avoid the serious complications. As the saying goes "Prevention is better than cure". So it is always advisable to screen yourself for diabetes if you stand the risk of suffering from it. If you're at risk of diabetes or have symptoms, you should take the test at a younger age and more frequently.
A fasting plasma glucose test is a simple, reliable test for diagnosing diabetes. After fasting overnight (or for 8 hours), a sample of your blood is drawn to measure the glucose level. Most people have a level between 70 and 100 milligrams of glucose per deciliter of blood (mg/dL).
A level of 126 mg/dL or higher on two tests confirms a diagnosis of diabetes. Your doctor may diagnose diabetes if you have a single very high fasting blood glucose level or a higher glucose level along with diabetes symptoms.