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A 31-year-old member asked:

Does a b12 test require serum or plasma?

1 doctor answer3 doctors weighed in
Dr. Kelty Baker
Hematology 28 years experience
B12 testing: Testing for vitamin B12 deficiency is done on serum samples.
Dr. Andrew Turrisi
Radiation Oncology 47 years experience
B-12 deficiencies cause macrocytic anemias (High MCHC on the CBC); B12 absorbtion requires intrinsic factor, produced in the stomach. B-12 shots are red, and used for placebo effect by some.
May 21, 2012

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Last updated Jun 24, 2014

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