can you drink water before fasting labs
Exam Preparation If you are asked to fast for your test: Â· Do not eat or drink anything (except water) for at least 8 hours before you go to the laboratory to have your blood taken. If your physician has ordered lipid tests, you must fast for at least 12 hours. You may drink water, but no juice, tea or coffee. Â· Do not smoke, chew gum, or exercise.