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 How Does Fasting Affect Glutathione Levels in The Body Benefits of Glutathione IV Fast Antioxidants Blood Plasma Quality Control by Plasma Glutathione Status Fasting Blood Test: How Many Hours Are Required? Centers Urgent Care