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you are usually told whether you need to fast before a blood test at the same time you are told you are having one.
It also depends on what the blood tests are looking at. the best idea would be to ring your GP or hospital, whoever told you about the blood test and ask.
In a uric acid test as would be done in the case of Gouty Arthritis; The uric acid test requires that the patient should be fasting (nothing to eat or drink) for at least eight hours before the test.
Wiki User
∙ 14y ago
Wiki User
∙ 9y agoUnless your doctor asks you to fast usually you do not need to for a thyroid blood test. Talk with your doctor if you have any questions regarding how they want you to prepare for your thyroid tests.
Wiki User
∙ 11y agoYes.
Usually, if blood is drawn, they check cholesterol and sugar, both of which should be done fasting.
Wiki User
∙ 7y agono
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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.
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.
Do you have to fast before a coumadin blood work?
No, you do not have to fast.
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
Why fast before a blood drawing?
You should fast before a blood drawing because the test being conducted is to measure your natural bodies elements. Foods might alter the composition of your blood.
Do you have to fast before a ggt blood test?
need not
Do you need to fast before testing for Calcium in blood?
No.
Is Fasting needed before cytology blood test?
Fast before cytology?
Can you have coffee before a fast?
No, as if you have anything it will show up in you blood.
Do you need to fast before a potassium blood test?
yes
Will a 12hr fast instead of an 8hr fast work ok before a blood test?
yes
How long do you fast before having blood drawn?
It rather depends on why blood is being drawn?
