My fasting blood glucose on testing was higher than my post food glucose. Is it abnormal? BODYiQ Self Request Blood Tests NZ (formerly MyTests) Which Blood Tests Require Fasting GGTp Blood Test: Uses and Normal Levels Fasting for blood work typically involves avoiding food and drink (except water) for eight to twelve hours to ensure accurate results, particularly for tests like glucose, cholesterol, and triglycerides. It is important Fasting Plasma Glucose Test: Uses, Procedure, Results