What does an put of range high b12 mean in the absence of supplements?

Might be serious: I am sorry to tell you that high B12 levels can be a sign of serious health problems including liver ; kidney disease, myelproliferative disorders including leukemia ; polycythemia vera ; hypereosinophilic syndrome. High intake of B12 does not cause these. It is important for you to be evaluated to find the underlying cause. See http://healthyeating.Sfgate.Com/high-vitamin-b12-mean-9057.Htm.

Excess intake or: Elevated blood levels of vit B12 are not associated w/ toxicity but may be associated w/ various hematologic conditions (eg myeloproliferative neoplasms, hypereosinophilic syndrome, gray platelet syndrome, macrophage activation syndrome), in some cases secondary to liver damage causing release of of the stored vitamin (eg cirrhosis, hepatitis, primary or secondary liver cancer). Quite rare.