Before a blood test, one common request doctors make is that you fast (no eating or drinking). This isn’t the case for all blood tests, but some do require that the patient fast beforehand to ensure more accurate results. While it’s great to get more accurate results, fasting for a blood test can be hard and requires some planning on your end, such as doing the test first thing in the morning rather than in the middle of the day.
We are here to teach you everything you need to know about fasting for a blood test. What you can and cannot eat, how long you need to fast, and so much more. We promise your doctor isn’t trying to make you hungry or irritable by scheduling a fasting blood test. He or she wants to get the most accurate results and give you the very best care possible. Here is everything to know about fasting for blood tests.
Why You Need To Fast
Fasting blood tests are necessary for certain tests where food and drink can interfere with the results. If you were to eat or drink before these tests, you would receive inaccurate results. According to Medline Plus, “When you eat and drink normally, those foods and beverages are absorbed into your bloodstream.”
Fats, carbohydrates, sugar, and so much more can cause you to have falsely elevated blood test results. Having inaccurate results can lead to a misdiagnosis and your doctor prescribing medications or procedures you don’t need. Always follow the orders regarding your blood test to get the best results and the care you need and deserve.