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A member asked:
I have a blood test tmrw afternoon to check my vitamin d. when do you have to fast for a blood test? i don't have to right? i forgot to ask. thanks.
A doctor has provided 1 answer
Not necessary but...: No, you do not have to fast for this test, but it is wise to not eat much within a couple of hours of any blood test as shortly after a meal your blood will be loaded with triglycerides which reduces the amount of serum available for testing. So i advise either eating a light lunch or waiting about 3 hours after eating- but that is not absolutely essential.
Answered 11/28/2017
4.4k views
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