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A member asked:
Had a blood test that used 4 vials. 2 had yellow substance at the bottom. she said i didn't need to fast beforehand. what tests are these?
A doctor has provided 1 answer
Blood tubes: Blood tubes are specific for the kinds of tests being done, and you were astute to recognize the "serum separator" tubes that enable the lab to quickly separate the serum from the cells. Aside from glucose and lipids, most routine tests do not require fasting to be reliable and interpretable.
Answered 7/24/2015
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