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A member asked:
What does high b12 in blood mean when really high?
A doctor has provided 1 answer
Needs evaluation: B12 is not toxic so high B12 due to taking it is not bad. If someone has high B12 without taking it then it can be a sign of serious problems including liver & kidney disease, myelproliferative disorders including leukemia & polycythemia vera & hypereosinophilic syndrome. High B12 does not cause these but caused by them. Further tests are needed to find the underlying cause: http://bit.ly/1hVpCY7
Answered 7/15/2014
3.9k views
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