Capillary Blood GSH Level Monitoring, Using an Electrochemical Method Adapted for Micro Volumes Total Glutathione Quest Find Lab Tests Online Lists of Blood Tests That Require Fasting Fasting requirements for Chemistry tests. 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 Tasso Lab Draw Concierge MD