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Otherwise the food you have eaten recently can affect the result of the test. For example, if you've eaten food with a lot of carbohydrates, your blood sugar may test unnecessarily high. If you've eaten a lot of fatty foods, it may show your cholesterol as higher than it actually is.

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Q: Why do you have to fast for blood work?
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Related questions

Do you have to fast before a coumadin blood work?

No, you do not have to fast.


Fasting before blood draw?

You only need to fast before blood work if you are having a fasting blood glucose blood test. Not each blood drawing will require you to fast. If you are required to fast, you may still drink water before your blood work.


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it works better and move fast trough your blood vessels.


Will a 12hr fast instead of an 8hr fast work ok before a blood test?

yes


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Yes, you need to fast. You should fast from food for approximately 12 hours, and fast from fluids for approximately 8 hours.


Can you have skim milk before a blood test?

If you are having blood work done and are told to fast, then you can drink nothing but water. If it is non-fasting, then you can have coffee, but be sure to tell the person doing the blood work.


What blood work do you have to fast for?

Most commonly are blood glucose levels and metabolic tests related to glucose level, and nuclear medicine cardiac studies.


How fast do robots work?

How ever fast you want them to work and how fast they can work


Do you have to fast for the chickenpox blood test?

No, you don't need to fast for the blood test for chickenpox.


Do you need to fast for a chickenpox blood test?

You do not need to fast for a chickenpox blood test.


Does a blood test invalidate the fast during Ramadan?

I am pretty sure that a blood test breaks your fast, either that or it almost breaks your fast.


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.