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Q: Is it necessary to fast for sodium blood test?
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Do you have to fast for an iron test?

When having a Total iron-binding capacity (TIBC) or transferrin, than it is necessary to avoid eating or drinking for 8 hours before the blood test. It is not necessary to fast when having a ferritin blood test.


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.


Do you need to fast before a cbc lab test?

No. It is not necessary to fast for a CBC. Generally tests like Lipid profiles and Glucose testing are ones that will require you to fast. CBC is a test that deals with your blood cells.


Do you need to fast before having a cbc lab test?

No. It is not necessary to fast for a CBC. Generally tests like Lipid profiles and Glucose testing are ones that will require you to fast. CBC is a test that deals with your blood cells.


Do you fast for thyroid blood test?

When having a Total iron-binding capacity (TIBC) or transferrin, than it is necessary to avoid eating or drinking for 8 hours before the blood test. It is not necessary to fast when having a ferritin blood test.


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.


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.


Do you need to fast before an iron blood test?

no because a blood test is about what your blood is normally like and if you fast you wont be your normal self


Do you fast for a wbc test?

For "wbc" or "white blood cell" test, you do NOT need to fast.


Do you have to fast for the cbc w diff blood test?

No you do not have to fast for it.