Tasso Lab Draw Concierge MD 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 Glutathione IV for Liver Detox: Support & Benefits AZ IV Medics Capillary Blood GSH Level Monitoring, Using an Electrochemical Method Adapted for Micro Volumes Which blood tests can be done without fasting? HealthcareOnTime