Blood Test Fasting Rules: Essential Dos, Don'ts & Timing HealthcareOnTime Rapid and effective protocol to measure glutathione peroxidase activity Bulletin of the National Research Centre Springer Nature Link 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 vs. Non Fasting Blood Tests: What's Actually Required?