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I believe it varies depending on which test they are performing. Some test do not require fasting and others require fasting for about 6-8 hrs while others require 10-12 while some require more. When in doubt about which one it is ask your doctor or lab technician.
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How long do you fast for a fasting blood test for metabolic functions?
that depends how fast you can fast when fasting for a fasting blood test for metabolic functions.
What blood tests require a patient to fast?
complete blood cell count
Do you have to fast before a blood sugar test?
I don't think you have to fast for twelve hours if you are having blood sugar tested. I would say you need to fast for at least six hours to eight hours.
Can you eat sugar free jello before blood test?
may I eat a sugar free jello during a fast before a blood chemistry test. Its a non glucose test also.
If you fast too long will the blood test be invalidated?
It depends on the type of blood test. For fasting sugar tests it can have an affect. Fasting longer than 12 to 14 hours will cause your body to start utilizing glycogen that is primarily stored in your muscles and that can affect blood tests for fasting sugar.
How can you tell if your blood sugars are within a healthy range?
You are able to test and see if your blood sugar range is healthy by first fasting for a 24 hour period. After you fast you can take a blood sugar test performed by your doctor.
How can I find out my blood sugar level?
If you want to find out your blood sugar levels you need to ask your doctor for a blood test. They usually make you fast before you take the test so that the results won't be influenced by a recent meal.
How does a doctor do a blood sugar test?
A doctor will test your blood glucose (sugar) level by either extracting blood through a needle, or pricking your finger and placing blood on a test strip. The blood is then tested (read by a meter) to determine your sugar level. The test can often be read the same day. To achieve the best results, or the most accurate reading, it is recommended that you fast for 24 hours before a test is to be taken.
Why do you fast before a blood test?
So the food doesn't affect your blood in any way (it can raise or lower your normal blood sugar levels).
Do you have to fast before you take your initial blood sugar level in the mornings?
It is generally a good idea to fast before testing your blood sugar first thing in the morning. If you test immediately after eating or drinking, the reading will not be as accurate.
Describe a fasting bood sugar test used to diagnose insulin resistance?
Fasting blood sugar measures the blood glucose level after a 12-hour fast (no food).
Do you have to fast for the chickenpox blood test?
No, you don't need to fast for the blood test for chickenpox.
