Fasting vs. Non-Fasting Blood Tests: What You Need to Know
Are you preparing for a blood test and wondering whether you need to fast beforehand? The answer depends on the specific test. Some common tests, like the CBC test and lipid profile test, may require fasting, while others, like the thyroid test, usually don't. It's important to understand which tests need fasting and how to properly prepare for your blood test at home or at a lab. Learn about fasting requirements for various blood tests and how to prepare for your next CBC blood test or other lab work. What Is Fasting for a Blood Test? Fasting for a blood test means refraining from eating or drinking anything except water for a specified period, usually 8–12 hours, before the blood test home collection or at a diagnostic centre. This allows your body to reach a metabolic baseline state. Nutrients from food and beverages can affect the levels of certain substances measured in blood tests, such as: Glucose Triglycerides Cholesterol Electrolytes B...