Fasting before blood test. Is it necessary for every test? Many people fast unnecessarily before routine blood tests. Only specific tests like Lipid Profile and Fasting Blood Sugar require 8 to 12 Your Glutathione Index Defines How Your Cells Are Ageing Have you ever wondered why doctors ask you to fast before certain blood tests? Fasting plays an important role in ensuring accurate and reliable test results. When we eat, food can General reaction mechanisms for antioxidant glutathione peroxidase Download Scientific Diagram Blood Tests (Requires Fasting)