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Avoid Freezing: Freezing can damage the sterile integrity of the water, so it should not be stored in the freezer
Patients are often advised to fast for several hours before the test, as recent food intake can affect folate measurements
May 10 2021;20:e20200164
So it can be tough for a doctor to determine that vitamin B12 deficiency is the problem, unless youve taken a baseline test beforehand and already know that your B12 levels are lower than they should be
Without equalization, you fight against pressure differences that make precise measurement difficult
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