So, you've got blood work coming up? Excellent! But before you head to the lab, it's crucial to know the fasting rules. Wondering, 'how long should you fast before blood work?' The standard answer is typically **8-12 hours**.
Why the fast? Fasting helps ensure accurate results, particularly for tests measuring glucose (blood sugar) and cholesterol. Eating can temporarily elevate these levels, potentially leading to a misdiagnosis.
However, not all blood tests require fasting! Your doctor will specify if fasting is necessary. If it is, generally, avoid food and sugary drinks. Plain water is usually okay. Certain medications might also need adjustments – always consult your doctor about these. Showing up unprepared could mean re-scheduling, so double-check your doctor's instructions beforehand! Following these guidelines ensures you get the most accurate and helpful results from your blood work.
