There are many tests for which fasting is not required. For example, for your lipid profile test or thyroid test or even the kidney function test, you don’t need to fast. But for your glucose test, or diabetes test, it is important that the level of sugar can be gauged without you having eaten anything that can add sugar to your bloodstream. Since fasting does not have an impact on other categories of tests but it affects the results of your diabetes test, it is advised that for this full health check, you submit your blood sample after fasting for 10 hours. The ideal time would be in the morning when you haven’t had your breakfast yet.