If your doctor has ordered blood work, there’s a good chance you’ve been asked to fast beforehand. But what exactly does fasting for blood work mean? What can you drink? Can you take medications? What happens if you accidentally eat? This guide breaks down all the do’s and don’ts of fasting for blood work , so you can walk into your lab appointment fully prepared—and avoid messing up your results. 🩺 Why Fasting Before Blood Work Matters Certain blood tests require fasting because food and drinks can temporarily change the levels of glucose, cholesterol, triglycerides , and other substances in your blood. Fasting helps ensure your results are accurate and reliable for diagnosis and treatment. ✅ Do’s: What You Should Do Before Fasting Blood Tests 1. Follow Your Doctor’s Instructions Your healthcare provider will tell you exactly how long you need to fast —usually between 8 to 12 hours before your test. 2. Drink Water 💧 Yes, you can and should drink water during your fas...