I can't find an answer to this question yet....
B12 is in the body in such minute amounts...one would wonder
what it would be for in those cells (which die in a short time).
B12 is used to make red cells, but......
Iron is in there of course.
Sodium, potassium, chloride, various peptides, proteins
Here is a complex wiki on red cells:
http://en.wikipedia.org/wiki/Red_blood_cell
I was suspecting not, but then found this paper on PubMed:
http://www.ncbi.nlm.nih.gov/pubmed/8352241
So I guess yes, if there is a test for it, then it must be there.
I am getting tired...today, been online since about 5am or so.
This is my last search for today.
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All truths are easy to understand once they are discovered; the point is to discover them.-- Galileo Galilei
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Weezie looking at petunias 8.25.2017
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