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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.

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13y ago

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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.


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.


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 blood test for hypocalcemia?

No, you do not have to fast before that test. You can have the blood draw done at any time.


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 will eating before a blood test effect your blood sugar levels?

Eating before a blood test will cause your blood sugar levels to rise. That is why they are referred to as "fasting" blood tests, meaning you are not supposed to eat or drink anything but water before having them.


Do you need to fast before a bun blood test?

Yes, it is recommended to fast for 8-12 hours before a blood test to ensure accurate results, especially for tests like fasting blood sugar or lipid profile. It's best to follow your healthcare provider's specific instructions regarding fasting prior to the test.


Does a diabetic test their blood sugar before a meal or after?

Before


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.


What blood tests require a patient to fast?

complete blood cell count


Do you have to fast before a ggt blood test?

need not


Do you need to fast before a potassium blood test?

yes